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Japanese Kana Name to Romaji Converter
x402
Japanese Kana Name to Romaji Converter is a paid API for AI agents from x402-ja-api.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Converts a Japanese name given in kana into multiple romanization formats (Hepburn, passport, macron, capitalized) for both family and given name parts.
Price / call$0.005
Success—
StatusUnknown
How this service works
Calendar and Japan data APIs for AI agents: worldwide holidays and business days (200+ countries), plus Japanese text-to-structure (address, name, bank, company normalization). Pay per call in USDC via x402, no API key.
Output
Returns a JSON object with the input kana string, romanized family and given name objects each containing macron, Hepburn, OH-style, passport, and capitalized variants, plus pre-formatted eastern-order, western-order, and passport composite strings.
Example use cases
Passport application name formatting
“I need to fill out a passport application for 田中 けいこ — can you give me her name in the official all-caps passport romaji format?”
International business card generation
“We're printing English business cards for our Japanese staff member whose name in kana is やまだ たろう — what's the correct capitalized western-order romanization?”
KYC user onboarding romanization
“A new user signed up with the kana name すずき はなこ — convert it to romaji in all the standard formats so I can populate our international database fields.”
Technical details
Endpoint
GEThttps://x402-ja-api.onrender.com/v1/jp/name/romajiWhen to prefer
Choose this endpoint when you specifically need to romanize a Japanese personal name provided in kana script and require multiple romanization standards simultaneously (Hepburn, passport, macron, OH-style). Prefer it over generic transliteration libraries when you need authoritative, passport-compliant output or when operating in a pay-per-call architecture via x402 that avoids subscription overhead.
Side effects
- Missing required 'kana' query parameter returns a 400 or validation error
- Non-kana input (kanji, latin, etc.) may produce unexpected or empty output
- Ambiguous single-token input (no space separator) may result in incorrect family/given split
- Name too long (exceeds 100 character limit) triggers validation rejection
- Payment failure via x402 protocol results in 402 Payment Required with no data returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"given": {
"kana": "ユウコ",
"macron": "Yūko",
"hepburn": "yuuko",
"ohStyle": "YUKO",
"passport": "YUKO",
"capitalized": "Yuko"
},
"input": "さとう ゆうこ",
"family": {
"kana": "サトウ",
"macron": "Satō",
"hepburn": "satou",
"ohStyle": "SATOH",
"passport": "SATO",
"capitalized": "Sato"
},
"eastern": "Sato Yuko",
"western": "Yuko Sato",
"passport": "SATO YUKO"
}
}Tags
x402
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