The longest Kanji and words in the Japanese language

We know that the Japanese language loves short words of only one syllable, but there are also long words you never imagined. A kanji reading is often one to three morae. Some readings fill a short phrase, and some names get long because Japanese, like German, sets older words side by side and leaves no space in the line.

Japanese even has a name for an unusually long word: 長大語 (chōdaigo). A dictionary gloss does another job: it explains a rare character in a full sentence. Lists on this subject often print that gloss in the reading column, which is how those huge syllable counts show up.

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Yojijukugo: words with four kanji

These are not the longest words in Japanese. 四字熟語 (yojijukugo) is the name for a phrase written with four kanji. In the narrow sense used in quizzes and textbooks, it is an idiom, often from a Chinese story or a Buddhist text. 一石二鳥 (isseki nichō) is the familiar one: one stone, two birds. 焼肉定食 is also four kanji, and it only names a grilled-meat set meal.

一人一人 (hitorihitori, each person) and めちゃくちゃ (mechakucha, a complete mess) turn up beside this topic. They are patterned words, and they run to about six morae. The four-kanji idioms are the other group.

Past four or five kanji, an everyday word is usually a name or a compound you can still split. 南阿蘇 and 白水高原 are words on their own before anyone joins them into a station name.

Long kanji readings

On the jōyō list, the long native readings in the references run to five morae. The usual three are 承る (uketamawaru), to hear something humbly or to take an order, 志 (kokorozashi), will or intention, and 詔 (mikotonori), an imperial edict. 承る keeps the okurigana る. 志 and 詔 hold the whole reading in the character. 政 has a classical reading of the same length, まつりごと (matsurigoto), the business of government and rites.

Kanji	Reading	Meaning
詔	mikotonori	imperial edict
志	kokorozashi	will, intention
政	matsurigoto	government, rites
承る	uketamawaru	to hear humbly, to receive an order

粉 is a different kind of dictionary line. The rare spelling 粉 for デシメートル (decimeter) is marked as a form people normally write in kana. In an ordinary sentence, 粉 is こな or ふん and means powder or flour. 忙, inside 忙しい, is いそがしい (isogashii), busy.

Some indexes go further and store a Chinese definition in the reading column. 孒 is glossed ひだりのうでがない, from an old note that the character means having no left arm. 砉 is glossed ほねとかわとがはなれるおと, the sound of bone and skin coming apart, and that gloss is the long entry quoted from the Morohashi dictionary's reading index. You won't hear either string in conversation.

A longer sentence gets copied as a pronunciation: ものかげからきゅうにとびだしてひとをおどろかせるときにはっするこえ. It runs to 33 morae, and the romaji runs to 62 letters, which is the figure older posts repeat. The sentence is the cry a person lets out when jumping from hiding to startle someone. The character sits outside the usual Japanese sets, so ordinary fonts skip it. If you can get it onto the page, tell me. I tried, and I still can't write the form. A second gloss, とらがひとをかもうとするときのうなりごえ, is the growl of a tiger about to bite. The person in the shadows and the tiger are two separate notes.

Long names written as one string

The mountain with the longest name in Japan is 牛奥ノ雁ヶ腹摺山 (うしおくのがんがはらすりやま), at 1,990 meters, on the border of Ōtsuki and Kōshū in Yamanashi. The usual account joins Ushioku, a place under the ridge, with a peak said to stand so high that a wild goose would brush its belly.

A Tendai temple in Chōnan, Chiba, carries the formal name 三途河頭極楽東門蓮華台上阿弥陀坊太平埜山本実成院長福寿寺. People know it as 長福寿寺 (Chōfukuju-ji). The long form stacks a mountain name, the cloister name 本実成院 (Honjitsujō-in) and the temple name, 28 characters together. It opens with 三途, the Sanzu River.

Near Pōrangahau, in Hawke's Bay, New Zealand, a hill has a Māori name that Japanese pages also quote. The long form on the sign has 85 letters: Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu. A katakana approximation is タウマタファカタンギハンガコアウアウオタマテアトゥリプカカピキマウンガホロヌクポカイフェヌアキタナタフ. The New Zealand Geographic Placenames Database records a shorter form of 57 letters, leaving out turi-pukakapiki-maunga-horo-nuku. The name is the summit where Tamatea, the ancestor with the big knees, played his flute to his beloved.

The Kojiki gives Ninigi a long formal name, 天邇岐志国邇岐志天津日高日子番能邇邇芸命, read あめにぎしくににぎしあまつひこひこほのににぎのみこと. Each 邇岐志 is read ニギシ, with ギ. Everyday Japanese shortens the name to ニニギノミコト.

On the Minamiaso Railway in Kumamoto, 南阿蘇水の生まれる里白水高原駅 (みなみあそみずのうまれるさとはくすいこうげんえき) is still famous for its length. Before the suffix 駅, the written name has 14 characters and the reading has 22 morae. For years that reading shared the longest place in Japan. The record has since moved. In 2026 the longest readings, 32 morae each, belong to two tram stops: トヨタモビリティ富山 Gスクエア五福前（五福末広町）停留場 in Toyama, renamed in 2021, and 西大寺町・岡山芸術創造劇場ハレノワ前停留場 in Okayama, renamed in 2023. Tickets and signs for the Minamiaso station often shorten it to 白水高原駅.

In the rakugo story 寿限無 (Jugemu), the parents ask a priest for auspicious phrases, and he keeps adding them until nobody can call the boy in from the street. The usual telling runs じゅげむじゅげむごこうのすりきれかいじゃりすいぎょのすいぎょうまつうんらいまつふうらいまつくうねるところにすむところやぶらこうじのぶらこうじぱいぽぱいぽぱいぽのしゅーりんがんしゅーりんがんのぐーりんだいぐーりんだいのぽんぽこぴーのぽんぽこなーのちょうきゅうめいのちょうすけ. Copies often print やぶこうじ twice. The line in the usual telling is やぶらこうじのぶらこうじ, yabura-kōji no bura-kōji.

The long Portuguese word and the short Japanese terms

Portuguese has its own giant adjective, pneumoultramicroscopicossilicovulcanoconiótico, at 46 letters. Brazil built it on an English word coined in 1935 by Everett M. Smith, then president of the National Puzzlers' League: pneumonoultramicroscopicsilicovolcanoconiosis, 45 letters. Dictionaries that include the English word call it an artificial name for a lung disease caused by very fine ash and sand dust. The katakana string ニューモノウルトラマイクロスコーピックシリコヴォルケーノコニオシス transcribes that English coinage, and it has 33 kana.

For the real illnesses in this family, Japanese medicine stays with short words. 塵肺 (jinpai) is pneumoconiosis. 珪肺 (keihai) is silicosis. Dictionaries also list 珪性肺塵症 (keiseihaijinshō) as a kanji rendering of the long English word. Japan has many volcanoes, and dust from them is still discussed with 塵肺 and 珪肺.

How Japanese builds a long word

Joining nouns is ordinary. Repeating a verb ending until the line looks longer is a joke on the page. 食べられられられられ and おいしくなくなくなく are that joke. なくなく, written 泣く泣く, is its own adverb and means reluctantly. A chain of なく on おいしくない is the same kind of joke.

A dictionary will file a long name or an idiom as one entry. With no spaces on the page, the entry looks like a single giant word. You can still take 南阿蘇, 水の生まれる里 and 白水高原 back apart.

If you know another long Japanese name that belongs with these, leave it in the comments.