Where does the data come from?

Static data based on JIS X 0401 (prefecture codes) and ISO 3166-2:JP, bundled into the tool. No external API.

Is Tokyo's capital "Tokyo" or "Shinjuku"?

The Tokyo Metropolitan Government building is in Shinjuku, so we list "Shinjuku" as the capital. Some textbooks use "Tokyo" for convenience.

Which romanisation scheme?

Modified Hepburn without macrons (Tokyo / Osaka / Kyoto / Hokkaido) — the standard form used in passports and English addresses.

Eight: Hokkaido, Tohoku, Kanto, Chubu (incl. Koshinetsu / Hokuriku / Tokai), Kinki, Chugoku, Shikoku, and Kyushu-Okinawa (including Okinawa Prefecture).

How does the search work?

Partial match against all 7 fields (code, ISO, kanji, hiragana, romaji, capital city in kanji / hiragana / romaji), case-insensitive with NFKC normalisation. Try "gifu", "Gifu", "21", "JP-21", or 岐阜 — they all hit the same row.

Back to Japanese

Japan Prefectures Lookup

Search all 47 Japanese prefectures by kanji / hiragana / romaji / JIS code / ISO 3166-2:JP / capital city. Filter by region (Hokkaido / Tohoku / Kanto / Chubu / Kinki / Chugoku / Shikoku / Kyushu-Okinawa). Useful for address validation, form helpers, and learning. Pure static data — instant, runs entirely in your browser.

japaneseextract

How to use

Search by kanji (e.g. 東京), hiragana (e.g. とうきょう), romaji (e.g. tokyo), JIS code (e.g. 13), ISO 3166-2:JP code (e.g. JP-13), or capital city (e.g. Yokohama). Filter further by region (Hokkaido / Tohoku / Kanto / Chubu / Kinki / Chugoku / Shikoku / Kyushu-Okinawa). All 47 prefectures bundled as static data — instant, runs entirely in your browser.

FAQ

Where does the data come from?: Static data based on JIS X 0401 (prefecture codes) and ISO 3166-2:JP, bundled into the tool. No external API.
Is Tokyo's capital "Tokyo" or "Shinjuku"?: The Tokyo Metropolitan Government building is in Shinjuku, so we list "Shinjuku" as the capital. Some textbooks use "Tokyo" for convenience.
Which romanisation scheme?: Modified Hepburn without macrons (Tokyo / Osaka / Kyoto / Hokkaido) — the standard form used in passports and English addresses.
How many regions?: Eight: Hokkaido, Tohoku, Kanto, Chubu (incl. Koshinetsu / Hokuriku / Tokai), Kinki, Chugoku, Shikoku, and Kyushu-Okinawa (including Okinawa Prefecture).
How does the search work?: Partial match against all 7 fields (code, ISO, kanji, hiragana, romaji, capital city in kanji / hiragana / romaji), case-insensitive with NFKC normalisation. Try "gifu", "Gifu", "21", "JP-21", or 岐阜 — they all hit the same row.

Related tools

Japanese era ⇄ Gregorian year — Meiji to Reiwa converter

Convert between Gregorian years and Japanese eras (Meiji, Taishō, Shōwa, Heisei, Reiwa) with a mode toggle. Accepts year-only or full date input, handles 元年 (year 1) and era-boundary transitions like 2019-05-01 → Reiwa 1 (令和元年). No dictionary download required — runs entirely inside your browser.

japaneseconversiontime

Hiragana ⇄ Katakana converter — bulk character mapping

Convert between hiragana and katakana with a single mode toggle. A purely mechanical per-character mapping — no dictionary download, instant conversion. Long-vowel mark, punctuation, kanji, and alphanumerics are preserved as-is. Runs entirely in your browser.

japaneseconversion

Kanji → Rōmaji converter — Hepburn / Kunrei-shiki / macron

Convert Japanese text to Hepburn romaji using kuromoji morphological analysis. Switch between full romaji and a ruby view, and choose macron long vowels (ō, ū) or literal doubled vowels (ou, uu). The dictionary downloads once and is then offline. Runs entirely in your browser.

japaneseconversion

Kanji Radical Lookup

Reverse-lookup kanji by Kangxi radical (1–214) and residual stroke count, just like the radical index in a paper kanji dictionary. Pick a radical (一 / 人 / 木 / 氵 / 言 …) and a remaining-strokes filter to list every matching CJK ideograph from Unicode 17.0 (28,000+ characters). Click to copy; component variants (心→忄, 水→氵, 艸→艹) are noted under each radical. Runs entirely in your browser.

japaneseextract