Kan-on

Kan'on is also a Japanese name for the bodhisattva Guanyin.

Kan-on or kan'on (漢音; Japanese pronunciation: [kaꜜɰ̃.oɴ] or [kaɰ̃.oɴ]) is one of the main strata of Sino-Japanese on'yomi (音読み). It primarily reflects Late Middle Chinese readings associated with the Tang capital Chang'an, transmitted to Japan during the Nara period and early Heian period through direct contact with Tang China, including the activities of envoys and Buddhist monks.^[1][2]

Kan-on became a learned and officially promoted reading norm, especially for Chinese classics, while the earlier go-on tradition remained established in Buddhist and other vocabulary. The two strata therefore coexist in Japanese rather than forming a simple succession, and individual words may contain readings from both.^[1][3]

Name

The element 漢 in the name does not date the readings to the Han dynasty. Ko Soo-man interprets it as representing China: Japanese envoys and monks learned the contemporary standard at Chang'an and called it 漢音, while applying 呉音 to the older body of readings already used in Japan. The two names later became conventional classifications of Japanized Sino-Japanese reading traditions.^[4]

History and use

Direct contact with Tang China during the Nara and early Heian periods made the Chang'an reading tradition a new model for Japanese readers of Chinese texts. Kan-on was associated especially with the study of Chinese classics, whereas go-on remained prominent in Buddhist recitation. A government notice of 792 instructed readers to become proficient in kan-on, and court and university institutions continued to promote it.^[2][1]

These policies did not eliminate the older layer. As direct contact with China later declined, both go-on and kan-on became established within Japanese. The reading used is lexical: a character may retain forms from both strata, and compounds can combine them.^[1][3]

Phonological characteristics

Kan-on reflects systematic adaptation of Late Middle Chinese sounds to the phonological contrasts of Early Middle Japanese. A corpus study of the initials of 2,136 kanji found that borrowers mapped features of source consonants into the Japanese system rather than simply selecting the closest surface sound.^[1]

Recurring correspondences with go-on include the following:^[2][1][5]

Feature	Go-on	Kan-on	Examples
Reflexes of Middle Chinese voiced obstruents	Often preserve a voiced Japanese reflex	Commonly have a voiceless reflex	神 jin / shin; 大 dai / tai; 土 do / to; 地 ji / chi; 分 bun / fun; 仏 butsu / futsu
Reflexes of nasal initials	Japanese m- or n-	Often Japanese b- or d-	男 nan / dan; 女 nyo / jo; 万 man / ban; 美 mi / bi; 無 mu / bu
Reflexes of Middle Chinese nasal/sonorant initials including the rì initial	Commonly Japanese n-	Commonly Japanese j-	二・児 ni / ji; 人・刃 nin / jin; 日 nichi / jitsu; 如 nyo / jo; 若 nyaku / jaku
Reflexes of final -t	May end in historical -chi	Regularly historical -tsu	質 シチ／シツ

The vowel and coda differences are also systematic, although individual dictionaries may disagree about rare or reconstructed forms. The following selection restores examples formerly shown in this article, using modern romanization and omitting disputed cases such as 月.^[5]

Kanji	Kan-on	Go-on	Kanji	Kan-on	Go-on
衣	i	e	気	ki	ke
解	kai	ge	外	gai	ge
西	sei	sai	米	bei	mai
公	kō	ku	頭	tō	zu
九・久	kyū	ku	音・隠	in	on
今・金	kin	kon	品	hin	hon
言・厳	gen	gon	行	kō	gyō
客	kaku	kyaku	白	haku	byaku
色	shoku	shiki	食	shoku	jiki
直	choku	jiki	力	ryoku	riki

A particularly extensive set of correspondences involves characters of the Middle Chinese Geng rhyme group. The examples below likewise appeared in the earlier article and are supported by a dedicated phonological comparison.^[6]

Kanji	Kan-on	Go-on	Kanji	Kan-on	Go-on
京・経	kei	kyō	形	kei	gyō
正・声	sei	shō	成・静	sei	jō
丁・挺	tei	chō	定	tei	jō
兵	hei	hyō	平・病	hei	byō
名・命・明	mei	myō	霊	rei	ryō
役	eki	yaku	石・赤	seki	shaku
寂	seki	jaku	暦	reki	ryaku

Dictionary classification and mixed readings

Not every kan-on form listed in modern Sino-Japanese dictionaries is directly attested in historical use. Lexicographers have sometimes supplied systematic readings from Chinese phonological sources; specialist studies therefore distinguish transmitted readings from later reconstructed or prescribed forms.^[7][1]

Go-on and kan-on may occur within the same compound. For example, gengo (言語) combines kan-on げん with go-on ご. A comparison of historical dictionaries found mixed readings in about 15% of the relevant two-character forms in the 12th-century Iroha Jiruishō and about 24% in the 1603–1604 Nippo Jisho, indicating an increase during the medieval period.^[3]

See also

• On'yomi: Sino-Japanese readings
  • Go-on: an earlier type of reading
  • Tō-on: a later type of reading
• Checked tone

References

1. Zeng, Huinan (2022). "Loanwords Adaptation: A Corpus Study of Sino–Japanese kan-on Initials". Studies in Language Sciences. 20 (1): 9–31. doi:10.34609/sls.20.1_9.
2. 漢音. 改訂新版 世界大百科事典 (in Japanese). Heibonsha. Retrieved 11 August 2026 – via Kotobank.
3. Ohshima, Hideyuki (2022). "The Blending of Go-on and Kan-on in Medieval Japanese: Compared with Sino-Japanese Words Found in Iroha Jiruishō and Nippo Jisho". Mathematical Linguistics. 33 (6): 373–388. doi:10.24701/mathling.33.6_373.
4. Ko, Soo-man (2010). 日本漢字音의 漢音ㆍ吳音이라는 명칭에 대하여 [On the names Kan-on and Go-on in Sino-Japanese readings]. 日本學硏究 (in Korean). 30: 5–22.
5. Tateno, Yukari (2016). 現代日本漢語の漢字音 [A Study on Modern Japanese Kanji-on] (PDF) (Doctoral thesis) (in Japanese). Seitoku University.
6. Jeon, Chang-hwan (2002). 日本呉音と呉方言の音韻的対応関係―主に梗摂字の音価を中心として― [Phonological correspondences between Japanese Go-on and Wu dialects, focusing on Geng-she characters]. 現代社会文化研究 (in Japanese). 25: 249–266.
7. Miyake, Marc Hideo (2003). Old Japanese: A Phonetic Reconstruction. RoutledgeCurzon. pp. 104–106. ISBN 978-1-134-40373-8.