Classical Japanese
Classical Japanese, also known as bungo (literary language) or kobun (ancient script), is the standardized literary form of the Japanese language that functioned as the primary written medium from the Heian period (794–1185) through the medieval and early modern eras, persisting in formal use until well into the 20th century.[1][2][3] Rooted in the spoken dialect of the Heian court aristocracy, particularly the 10th- and 11th-century elite vernacular, it evolved into a largely frozen stylistic register that diverged from evolving colloquial speech, emphasizing elegance, concision, and poetic nuance.[1][4] Grammatically, Classical Japanese exhibits features distinct from modern Japanese, including a complex system of verb inflections based on morphological stems (e.g., four bases for conjugation: irrealis, continuative, terminal, and attributive), auxiliary verbs for tense and mood, and particles like ga and wo that differ in function and placement from their contemporary counterparts.[1][5] Written primarily in kana (hiragana and katakana syllabaries) alongside kanji, it allowed for phonetic representation of native Japanese words while incorporating Sino-Japanese vocabulary, facilitating the creation of intricate prose and verse.[1][3] These elements made it ideal for literary expression, though its study requires bridging significant syntactic and lexical gaps with modern Japanese. The language's significance lies in its role as the vehicle for Japan's canonical literature, including Murasaki Shikibu's The Tale of Genji (c. 1008–1021), the world's first novel, which explores Heian court life, romance, and impermanence; waka poetry anthologies like the Kokin Wakashū (905); and later works in noh drama and kabuki scripts.[4][2] It underpinned cultural traditions, from historical chronicles to philosophical and Buddhist texts, shaping Japanese aesthetics like mono no aware (the pathos of things).[1][3] In the modern era, Classical Japanese influences persist in formal writing, journalism, song lyrics, and poetry, while its study remains essential for scholars of premodern Japan, enabling access to primary sources in history, religion, and thought.[2] Textbooks like Alexander Vovin's A Reference Grammar of Classical Japanese (2003) and Haruo Shirane's Classical Japanese: A Grammar (2005) provide systematic analyses, drawing on traditional philology and Western linguistics to decode its structures.[1][3]Introduction
Definition and Scope
Classical Japanese, also known as bungo (literary style), is the written literary register of the Japanese language employed from the 8th to the 19th centuries, predominantly in prose narratives, poetry, and historical records.[6] This form emerged during the Heian period (794–1185) as a standardized literary medium but continued in use through the medieval and early modern eras, serving as the prestige variety for formal writing across genres such as waka poetry and monogatari tales.[7] Its scope encompasses not only original compositions but also commentaries, essays, and adaptations that preserved its stylistic conventions into the early 20th century.[8] Unlike colloquial speech, Classical Japanese formed part of a diglossic system in premodern Japan, where the elevated literary register coexisted with evolving spoken dialects, maintaining syntactic and lexical conservatism in writing while vernacular forms advanced phonologically and grammatically.[9] In contrast to Modern Japanese, it features a complex system of verb inflections, a distinct particle system, and vocabulary rooted in Sino-Japanese and native archaisms, reflecting a phonology closer to that of the 9th–12th centuries rather than contemporary standard pronunciation.[10] These differences often require specialized training to parse, as Modern Japanese has shifted toward analytic structures and incorporated Western loanwords absent in the classical lexicon.[11] Key characteristics include the retention of archaisms such as obsolete kinship terms and nature descriptors, a prolific array of auxiliary verbs (jodōshi) that encode modality, evidentiality, and aspect—e.g., keri for realization or nari for explanatory emphasis—and a fixed orthography based on historical kana usage that preserves Heian-era distinctions like the pronunciation of h as or wi as a separate vowel.[12][13] This orthographic stability, using man'yōgana-derived kana, allowed for rhythmic and allusive precision in literature, distinguishing it from the phonetic reforms of modern script. Representative texts illustrate its scope, such as The Tale of Genji (Genji Monogatari, ca. 1008) by Murasaki Shikibu, which exemplifies the intricate interplay of auxiliary verbs and archaisms in depicting courtly life and emotions through a prose style that prioritizes implication over explicitness.[10] Similarly, collections like the Kokin Wakashū (905) showcase its poetic application, where fixed phonology and modal auxiliaries enhance seasonal imagery and interpersonal nuance.[8]Historical Periods
Classical Japanese emerged during the Heian period (794–1185), when it became the established literary standard for courtly writing among the aristocracy in the capital of Heian-kyō (modern Kyoto).[14] Heavily influenced by Chinese literary models, it adapted kanji for phonetic representation (man'yōgana) and saw the development of kana scripts in the 9th century, with hiragana evolving from cursive forms used primarily by women for poetry and prose, and katakana from angular forms employed by Buddhist scholars for annotating Chinese texts.[15] This period marked Early Middle Japanese as the foundational stage of Classical Japanese, characterized by its use in elite literature like diaries and tales.[14] In the subsequent Kamakura (1185–1333) and Muromachi (1336–1573) periods, Classical Japanese maintained its dominance in literary and documentary contexts, even as spoken language began to diverge with regional variations and simplifications.[16] This era, corresponding to Late Middle Japanese, witnessed the rise of texts associated with the warrior class, including historical chronicles and military narratives, which preserved the formal style amid social shifts toward feudal structures.[14] Linked verse poetry, or renga, flourished during the Muromachi period, sustaining Classical Japanese forms through collaborative composition rules that emphasized classical vocabulary and syntax.[17] The Edo period (1603–1868) represented the zenith of Classical Japanese codification, driven by widespread education, woodblock printing, and institutional use in scholarship and theater.[16] Despite this standardization, gradual influences from colloquial speech appeared in popular genres, though the classical style remained the prestige norm.[14] Comic linked verse, or haikai, evolved from renga traditions, helping to preserve and adapt Classical Japanese elements in accessible, humorous sequences that bridged elite and common audiences.[18] From the Meiji period (1868 onward), Classical Japanese declined sharply due to the genbun itchi (unification of spoken and written language) movement, which promoted aligning writing with contemporary Tokyo dialect to foster national unity and modernization.[14] This reform, accelerated by Western influences and educational reforms, relegated Classical Japanese to specialized literary and historical study, ending its role as the primary written standard.[16]Phonology
Vowels
The vowel system of Classical Japanese, as reconstructed from texts of the Nara and Heian periods (roughly 8th–12th centuries), features an eight-vowel inventory comprising the short vowels /a, i, ɨ, u, e, ɛ, o, ɔ/, distinguished primarily by quality and height, with no initial contrast in length within open syllables.[19] This system reflects the earlier Old Japanese stage, where distinctions between kō-rui (type A) and otsu-rui (type B) vowels—such as /i/ (kō) versus /ɨ/ (otsu) or /e/ (kō) versus /ɛ/ (otsu)—were phonemically relevant, often notated in romaji with subscripts (e.g., i₁ for /i/, i₂ for /ɨ/).[20] Over time, these qualitative differences began to erode, particularly in the transition to Middle Japanese, but remained audible in conservative speech during the Classical era.[21] The vowel system in Classical Japanese inherited constraints on co-occurrence within root morphemes from Old Japanese, associated with Arisaka's Law, which prohibited certain combinations such as an otsu-rui /o/ (often realized as /ɔ/ in reconstructions) alongside /a/, /wo/, or /u/, promoting assimilation to maintain phonological balance.[20] Assimilation rules further shaped pronunciation, with alternations between vowels like /i/ and /ɨ/ occurring in specific morpheme contexts due to progressive or regressive influences, such as raising or centralization before high vowels; for instance, /i/ could shift toward /ɨ/ in adjacent syllables to avoid hiatus.[19] These processes ensured smoother syllabic flow in compounds and inflections, though they were not as systematic as in agglutinative languages with full harmony systems.[22] Distinctions between long and short vowels emerged primarily through gemination or contraction rather than inherent phonemic length, with short vowels forming the core of the CV syllable structure; in romaji notation, long vowels—arising from vowel sequences or historical *pJ length—are marked with macrons (e.g., /a:/ as ā, /i:/ as ī) to indicate compensatory duration in reconstruction.[20] This notation aids in distinguishing prosodic weight, as seen in poetic meter where long vowels could occupy two morae.[22] Evidence for these vowel distinctions, including length contrasts, is preserved in the strict syllabic counting of 31-syllable waka poetry, such as in the Man'yōshū anthology, where orthographic variations (e.g., separate kana for kō- and otsu-rui /e/ and /ɛ/) ensured rhythmic precision; for example, the line structure 5-7-5-7-7 morae relied on treating certain vowel pairs as fused or distinct to fit the meter without alteration.[20] Such poetic constraints highlight how /ɨ/ and /ɛ/ were perceived as separate from /i/ and /e/, influencing rhyme and alliteration.[22] In the shift to Modern Japanese, the Classical eight-vowel system underwent significant mergers: the kō-rui and otsu-rui distinctions merged, with /ɨ/ merging into /i/, /ɛ/ into /e/, and /ɔ/ into /o/ (shifting to /u/ in certain back vowel contexts), reducing the inventory to the familiar five vowels /a, i, u, e, o/ and simplifying assimilation patterns.[21] These changes, driven by dialectal leveling in central Japan, erased the kō-otsu distinctions entirely by late Middle Japanese, though traces persist in Ryukyuan languages and conservative readings.Consonants
The consonant inventory of Classical Japanese, as reconstructed for the Early Middle Japanese (EMJ) period corresponding to the Heian era (roughly 794–1185 CE), consisted of a relatively simple set of phonemes, building on the Old Japanese (OJ) system while undergoing initial lenition processes. The core consonants included voiceless stops /p, t, k/, a voiceless fricative /s/, nasals /m, n/, a liquid /r/, and glides /w, y/, with voiced counterparts /b, d, g, z/ that were likely prenasalized in OJ but had lost this feature by EMJ, simplifying to plain voiced obstruents. Unlike modern Japanese, where additional fricatives like /ɸ/ and /ç/ appear, the EMJ system lacked these, though /p/ was beginning to fricativize. The following table illustrates the primary consonant phonemes and their approximate phonetic realizations in EMJ, based on comparative reconstructions:| Place of Articulation | Voiceless | Voiced | Nasal | Other |
|---|---|---|---|---|
| Bilabial | /p/ [p ~ ɸ] | /b/ | /m/ | /w/ |
| Dental/Alveolar | /t/ | /d/ | /n/ | /r/ [ɾ ~ r], /s/ , /z/ |
| Palatal | - | - | - | /y/ |
| Velar | /k/ | /g/ [g ~ ŋ] | - | - |
Orthography
Character Forms
Classical Japanese texts predominantly utilized kyūjitai, the traditional, more complex forms of kanji characters, in contrast to the shinjitai simplified variants adopted in post-World War II modern Japanese orthography. For example, the kanji representing "country" appears as 國 in kyūjitai, while its shinjitai counterpart is 国.[25] These older forms were standard in writing from the Heian period onward, reflecting the influence of Chinese script without the later simplifications.[26] A key feature of Classical Japanese orthography was the integration of kanji with kana, where kanji denoted content words and kana marked inflections and particles. This mixed system originated in man'yōgana, an early practice from the Nara period (710–794 CE) in which multiple kanji were selected solely for their phonetic values to transcribe Japanese sounds, bypassing their semantic roles.[27] Kana development from kanji simplifications is further explored in the Kana Orthography section. Classical writing also employed hentaigana, a diverse set of variant kana forms derived from different cursive styles of kanji, which allowed for stylistic variation but complicated readability. These variants proliferated in premodern texts, with over a thousand forms documented, though efforts toward greater uniformity emerged in printed materials during the Edo period (1603–1868), particularly through woodblock printing conventions that favored certain styles for consistency.[26] Full standardization of kana to eliminate hentaigana occurred later in the Meiji era, but Edo-era prints marked an initial shift from the fluidity of handwritten variants.[27] Manuscripts of Classical Japanese works exhibited significant orthographic flexibility, including hentaigana and ateji—phonetic applications of kanji to indigenous words irrespective of meaning—to approximate native vocabulary. For instance, ateji might repurpose a kanji meaning "garden" (tíng in Chinese) to phonetically represent the Japanese noun "niwa" (garden), as seen in early adaptations of Chinese-derived script for vernacular use.[15] In contrast, printed editions from the Edo period onward imposed more regularity, reducing variant usage to streamline production while preserving the kanji-kana blend essential to classical expression.[26] Modern reproductions of Classical Japanese texts, such as scholarly editions of the Genji Monogatari or Man'yōshū, often retain kyūjitai and hentaigana to faithfully reconstruct historical authenticity, though accessible versions may convert to shinjitai for contemporary readers.[25] This preservation ensures the visual and cultural integrity of original manuscripts and prints, supporting linguistic studies and cultural heritage initiatives.[26]Kana Orthography
The kana orthography of Classical Japanese, known as rekishi-teki kana-zukai (historical kana usage), emerged in the Heian period (794–1185) as a system of phonetic spelling that preserved the pronunciation of that era, even as spoken Japanese evolved. This orthography utilized hiragana and katakana, both derived from simplified forms of kanji (Chinese characters). Hiragana developed in the second half of the 9th century from cursive, grass-script styles of kanji, primarily used by court women for private writings such as poetry and diaries, while katakana arose earlier in the same century from abbreviated parts of kanji (e.g., radicals or stroke components), often employed by men for official annotations and glosses on Chinese texts.[15] These scripts allowed for a purely phonetic representation of Japanese, distinct from the logographic kanji, and fixed spellings to reflect Heian-era phonology, such as rendering modern /i/ as wi (ゐ).[28] The core rules of rekishi-teki kana-zukai systematically mapped kana to historical sounds, particularly in medial and final positions within words. For the H-row (ha-gyō: は, ひ, ふ, へ, ほ), these were pronounced as /wa/, /i/, /u/, /e/, /o/ respectively when not word-initial; for example, kaha (河, river) was read as /kawa/, and hito (人, person) as /pito/ or /ɸito/ (modern /hito/).[12][29] The W-row (wa-gyō: わ, ゐ, う, ゑ, を) similarly shifted, with wi (ゐ) pronounced /i/, we (ゑ) as /e/, and wo (を) as /o/; thus, wido (井戸, well) became /ido/, and the directional particle he (へ) was vocalized as /e/. In the D-row (da-gyō: だ, ぢ, づ, で, ど), di (ぢ) represented /zi/ or /dʑi/, and du (づ) /zu/ or /dzu/, distinguishing sounds that later merged; for instance, ajisai (紫陽花, hydrangea) was spelled a-di-sawi but pronounced a-ji-sawi with /zi/. Mergers of obsolete kana included ゐ (/wi/ to /i/) and ゑ (/we/ to /e/), contributing to the simplification of the phonological system.[12][30][31][32][33] Additional conventions addressed consonant clusters, vowels, and auxiliaries. Gemination (sokuon, っ) indicated doubled consonants using a small tsu (っ), as in gakkō (学校, school) spelled with full-sized tsu in some historical contexts but standardized as small for closure; this marked obstruent lengthening without altering the syllabic structure. Labialized consonants, such as prenasalized /mb/ from F (h-row) + vowel + F, were written with u + small a (e.g., hua for /wa/), reflecting Heian fricatives. Long vowels (chōon, 長音) were denoted by sequences like au or afu for /ō/ (e.g., tafu for /tō/, tower), iu or ifu for /yū/ (e.g., ifu for /yū/, to say), and eu or efu for /yō/ (e.g., kefu for /kyō/, today). Palatalized long vowels (kaiyōchōon, 開拗長音) extended this to yōon combinations, such as ki-yau for /kyō/, preserving fronted diphthongs from Heian shifts. For the auxiliary verb mu (む), indicating intention or speculation and attaching to the mizenkei (irrealis) form, it was spelled mu but often nasalized to /n/ in connected speech (e.g., yukan for yukamu, will go), with orthographic exceptions in compounds where it fused without vowel elision.[30][12][28][34] While rekishi-teki kana-zukai was largely consistent, exceptions arose from scribal errors or regional variations, such as orohiha mistakenly for oroiwa (折井葉 vs. 折岩, uncertain leaf vs. rock), or inconsistent use of wi (ゐ) persisting in some words despite merger to /i/ (e.g., wi in miru spelled ゐる). These irregularities were codified in the Edo period (1603–1868) by scholars like Keichū, but the system endured until orthographic reforms. In the 20th century, post-World War II changes under the Ministry of Education transitioned to gendai kana-zukai (modern kana usage) in 1946, aligning spellings with contemporary Tokyo pronunciation by eliminating obsolete kana like wi and we, standardizing long vowels as doubled (e.g., ō as おお), and simplifying geminates and palatalizations for phonetic accuracy. This reform, debated since the [Meiji era](/page/Meiji era) (1868–1912), reduced ambiguities but preserved historical orthography in scholarly editions of classical texts.[28][32][35]Vocabulary
Lexical Sources
The vocabulary of Classical Japanese is predominantly drawn from two primary sources: native Japanese words, known as yamato kotoba or wago, and Sino-Japanese borrowings, referred to as kango. Native words form the core of everyday and expressive lexicon, while kango entered the language through cultural and scholarly exchanges with China, particularly from the 5th to 9th centuries. In Heian-period prose, such as Genji Monogatari (c. 1008), lexical analysis reveals that approximately 94-95% of unique words are native Japanese, with Sino-Japanese terms comprising only about 5% (712 unique kango out of 14,967 total), though their text frequency can reach 12.6% due to repetition in specific contexts like official titles or Buddhist concepts.[36] This composition reflects the period's emphasis on native aesthetic and narrative styles, especially in women's literature, where kango usage remained limited compared to later medieval texts.[36] Sino-Japanese vocabulary typically employs on'yomi (Chinese-derived readings), which were adapted into Japanese phonology during the importation of kanji, while native words use kun'yomi (native Japanese readings) when associated with kanji or are rendered in hiragana without kanji. In Classical Japanese contexts, on'yomi predominated in compounds for administrative, religious, and scientific terms, such as keishi (on'yomi for "capital city"), reflecting their formal Sino-inspired origins, whereas kun'yomi appeared in standalone native nouns or verbs, like yama for "mountain." This distinction facilitated code-switching between native prose and Sino-influenced genres like kanshi poetry, with kun'yomi preserving phonological features of Old Japanese. (Shibatani 1990) Classical Japanese includes numerous archaic words that have since undergone semantic shifts, particularly in native terms expressing nuanced emotions central to poetry and narrative. For instance, aware, a native exclamatory particle and noun, originally connoted a profound sensitivity to the ephemeral beauty or pathos of nature and human experience in Heian waka, as emphasized in the Kokin Wakashū preface (c. 905), but broadened over time to encompass general wistfulness or pity in modern usage. Such shifts often involved extension from sensory or situational evocations to abstract emotional states, enriching poetic expression while highlighting the language's evolution from concrete imagery.[37] Influence from substrate languages like Ainu on Classical Japanese vocabulary was minimal, limited to a handful of northern toponyms and nature-related terms (e.g., kamuy for deities influencing some ritual lexicon), as the core lexicon developed in central Yamato regions distant from Ainu territories. Comprehensive glossaries like the Wamyō Ruijushō (compiled c. 931–937 by Minamoto no Shitagō) exemplify early lexical organization, categorizing entries into 24 thematic sections (e.g., heaven, earth, human body) with native Japanese equivalents (kun'yomi or phonetic glosses) alongside Chinese characters and on'yomi, serving as a bridge between native and imported terminology without significant non-Japonic input.[38] This work, the oldest extant Japanese dictionary, prioritized native classifications to systematize the lexicon for court scholars.[38]Honorifics and Registers
In Classical Japanese, honorifics formed a sophisticated system of linguistic deference known as keigo, which encoded social hierarchies through verb auxiliaries, prefixes, and specialized vocabulary, reflecting the speaker's relationship to the subject, addressee, and context. This system distinguished between sonkeigo (respectful language, elevating the actions of superiors), kenjōgo (humble language, lowering the speaker's actions), and teineigo (polite language, adding general courtesy). These forms were integral to courtly communication during the Heian period (794–1185), where nuanced registers maintained aristocratic etiquette, but they adapted in later periods to accommodate emerging warrior classes.[39] Sonkeigo typically employed auxiliaries attached to verb stems to honor superiors, such as -raru (added to the mizenkei form for passive-like elevation) or tamafu (a yodan verb following the ren'yōkei), often combined for heightened respect. For instance, the verb "to see" could become mi-tamafu by prefixing mi- (an honorific element) to the stem and adding tamafu, as in 若君はいとあはれなる歌を詠み給ひたり ("The young prince composed a poignant poem," elevating the prince's action). Hyper-respectful constructions layered auxiliaries like -sasu (causative) with tamafu, yielding forms such as 矢を射さし給ふ ("He deigns to shoot an arrow"). These were prevalent in Heian court literature, such as The Tale of Genji, to depict interactions among nobility.[40][39][41] Kenjōgo humbled the speaker's actions toward superiors, using auxiliaries like the shimo-nidan form of tamafu or verbs such as mairasu ("to give/go," humbling the act) and mousu ("to say"). An example is 我が子ぞ 往に給ふる ("The one who will leave is my child," where tamafu lowers the family's departure in addressing a superior). This contrasted with sonkeigo by focusing on self-deprecation rather than elevation.[40] Teineigo provided a baseline politeness through auxiliaries like -sōrō, a humble ending attached to ren'yōkei forms, which gained prominence in late Classical texts during the Kamakura period (1185–1333), as seen in The Tale of the Heike for courteous narration. Unlike the more stratified sonkeigo and kenjōgo, teineigo ensured overall decorum without specific deference.[39] In Heian courtly registers, honorifics emphasized refined interpersonal dynamics among aristocrats, with elaborate layering in poetry and prose to signal rank and intimacy, as documented in works by female authors like Murasaki Shikibu. Samurai adaptations in the Kamakura and Muromachi periods (1336–1573) retained core auxiliaries but integrated them into warrior narratives, shifting focus to martial loyalty; for example, tamafu appeared in epic tales to honor lords, though with plainer syntax reflecting bushi (warrior) pragmatism over courtly flourish.[39][42][43] Gendered language differences were prominent, particularly in Heian women's speech, which featured softening particles like sentence-final -wa to convey modesty and elegance, as in diary entries and monogatari where noblewomen ended statements with -wa or -kashira for tentative politeness. This feminine register contrasted with masculine forms, reinforcing gender roles in courtly discourse, though men occasionally adopted it for stylistic effect in literature.[44] The evolution of these honorifics toward modern Japanese involved simplification and grammaticalization; Classical auxiliaries like -raru and -sōrō largely fell out of use by the Edo period (1603–1868), replaced by prefixes such as o- for sonkeigo and -masu for teineigo, while kenjōgo incorporated causative -saseru. This shift reflected broader societal changes, including the Meiji era's standardization, leading to the loss of many Classical forms in everyday speech by the 20th century, though they persist in formal literature and rituals.[45]Grammar
Nouns and Pronouns
In Classical Japanese, nouns are classified primarily into common nouns, which denote general objects, concepts, or categories such as yama (mountain) or mizu (water), and proper nouns, which specify unique entities like personal names (Hiroko), place names (Kyōto), or specific titles. This distinction mirrors modern Japanese but was more rigidly observed in literary prose, where proper nouns often required contextual honorific modifications. Classical Japanese nouns lack inflection for grammatical gender, with no masculine, feminine, or neuter categories imposed on lexical items; any gender implication arises semantically from cultural associations rather than morphology. Similarly, there is no obligatory marking for number, so singular or plural interpretation depends on quantifiers like tagē (many) or context, avoiding the plural suffixes common in other languages. Pronouns in Classical Japanese constitute a sparse inventory compared to Indo-European languages, emphasizing contextual inference over explicit reference. The first-person singular is typically rendered as ware (我) or its variant a, often carrying a formal or emphatic tone, while the plural form extends to ware-ra in limited cases; second-person forms include na (name, implying "you") or nare, used sparingly to maintain politeness and avoid direct confrontation. Third-person pronouns are rare, frequently replaced by demonstratives like so (that) or omitted entirely, as the language favors pro-drop structures where subjects and objects are elided when recoverable from discourse. This omission promotes stylistic indirectness, a hallmark of Heian-period literature, where explicit pronouns could disrupt the elegant ambiguity valued in prose and poetry. Personal pronouns derive from nominal roots—ware from an existential sense of "being" and na from "name"—and show no case inflection, relying instead on postposed particles for syntactic roles.[46] Genitive constructions in Classical Japanese prose link nouns attributively without a dedicated subject particle like modern ga in nominal phrases; instead, the particles no and ga serve interchangeably to indicate possession, origin, or description, with no predominating in written forms for smoother flow. For instance, yama no kami (山の神) translates to "mountain god," where yama (mountain) modifies kami (god/spirit) via no, forming a compound noun that evokes Shinto deities associated with natural features. This structure allows for concise appositions, as in Kiyomizu no mizu (Kiyomizu's water), denoting water from the Kiyomizu stream, and extends to complex chains without additional markers. The choice between no and ga often reflects stylistic variation or regional influences in early texts, but ga appears more in poetic contexts for rhythmic effect.[12] Nominalization transforms verbal or adjectival elements into noun-like units, primarily through the genitive no suffixed to the rentaikei (attributive) form of verbs or adjectives, or via the stative existential ar- (あり), which embeds clauses as nominal predicates. The no construction, as in taberu no (eating [the act of]), turns a verb phrase into a substantive for further modification, enabling embedded clauses like hana miru no tanoshimi (the pleasure of viewing flowers). The ar- form, derived from the verb "to exist," nominalizes stative descriptions, such as kirei naru aru mono (a thing that is beautiful), integrating sensory or existential qualities into nominal slots. These mechanisms facilitate hypotaxis in complex sentences, allowing Classical Japanese to layer ideas without heavy reliance on conjunctions, as seen in literary works where nominalized clauses describe emotions or events abstractly. Particles may attach to these nominalized forms to indicate case, but such syntax is detailed elsewhere.[47]Verbs
Classical Japanese verbs are conjugated according to a system of inflectional classes known as katsuyō, which determine how stems combine with endings to form various grammatical functions such as tense, mood, and voice. The language distinguishes five primary regular verb classes inherited from Old Japanese: quadrigrade (yodan; consonant-stem with four vowel alternations), upper and lower bigrade (kami and shimo nidan; vowel-stem with two alternations), and upper and lower monograde (kami and shimo ichidan; vowel-stem with one alternation), plus irregular (katsuyō fushō). Irregular verbs deviate from regular patterns and include high-frequency items like suru ("do") and kuru ("come"). Conjugations produce six key forms: irrealis (mizenkei, for potential and desiderative), conjunctive (ren'yōkei, for connecting clauses), conclusive (shūshikei, for sentence endings in plain style), attributive (rentai, for modifying nouns), realis (izenkei, for past and conditional), and imperative (meireikei, for commands).[48] The quadrigrade (yodan) class, the most productive for native Japanese verbs, includes stems ending in consonants like -k, -s, -t, -r, or -n, with alternations across four vowel rows (a-i-u-ru-e). For example, the verb kaku ("write") conjugates as follows in its irrealis form kaka (used with auxiliaries like -mu for volition), conjunctive kaki, conclusive kaku, attributive kaku, realis kake, and imperative kake. Upper monograde (kami ichidan) verbs, typically ending in -iru in modern reflexes, have vowel stems (e.g., mi- from miru, "see") and show uniform -i row endings with little variation: irrealis mi, conjunctive mi, conclusive miru, attributive miru, realis mire, imperative miyo. Lower monograde (shimo ichidan) verbs end in -eru (e.g., keru, "kick"), with -e stems: irrealis ke, conjunctive ke, conclusive keru, attributive keru, realis kere, imperative keyo. Bigrade (nidan) verbs, divided into upper (kami nidan, i/u alternation, e.g., oyob-u, "reach") and lower (shimo nidan, e/u alternation, e.g., tae-yu, "endure"), feature limited two-step changes as vowel-stem verbs: for oyobu, irrealis oyob-, conjunctive oyobi, conclusive oyobu, attributive oyoburu, realis oyobure, imperative oyobeyo; similar patterns apply to shimo nidan with e-stems. Irregular verbs (katsuyō fushō) include subtypes like sa-hen (suru: irrealis sa-, conjunctive shi, conclusive suru, etc.), ka-hen (kuru: irregular blends), na-hen (shinu, "die": irrealis shina, conjunctive shini, conclusive shinuru), and ra-hen (aru, "be": defective patterns).[49][48]| Form | Yodan (kaku, "write") | Kami Ichidan (miru, "see") | Shimo Ichidan (keru, "kick") | Kami Nidan (oyobu, "reach") | Irregular (suru, "do") |
|---|---|---|---|---|---|
| Irrealis | kaka | mi | ke | oyoba / oyob- | sa- |
| Conjunctive | kaki | mi | ke | oyobi | shi |
| Conclusive | kaku | miru | keru | oyobu | suru |
| Attributive | kaku | miru | keru | oyoburu | suru |
| Realis | kake | mire | kere | oyobure | sure |
| Imperative | kake | miyo | keyo | oyobeyo | seyo |