Writing your name in romaji for a form

The job

A form asks for your name “in romaji” — meaning the Hepburn system that Japanese passports use. The converter turns こんにちは into konnichiwa in either direction, with two options that matter for official documents.

The two options that matter

Macrons: passports and official romanization use a line over long vowels — 大きい becomes ōkii, not ookii. Enable the macron option for documents that need it; leave it off for casual use where typing ō is awkward.

ん before b, m, p: traditional Hepburn writes shimbun (しんぶん), not shinbun. Passport spellings follow this rule, so enable it when the form is official.

Worked example

佐藤翔太 (Satō Shōta) — type さとうしょうた, enable macrons, get satō shōta. 新橋 (Shimbashi) — type しんばし, enable the m-option, get shimbashi. Kanji cannot be converted automatically: 山田 stays 山田, so convert the kana reading instead.

Limits

This is a character-level converter, not a name dictionary. It does not know that 本田 is Honda rather than Honta in a specific family's reading, or that a given name might use a nonstandard spelling chosen at birth registration. Check the result against any existing document before submitting it.