# Japanese Kana Name to Romaji Converter

> 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.

## Facts

- Endpoint: GET https://x402-ja-api.onrender.com/v1/jp/name/romaji
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japanese-kana-name-to-romaji-converter-b1840e98
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EFVCSMB07LBYemJJd4nYl

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability japanese-kana-name-to-romaji-converter-b1840e98
```

Example prompt: Can you convert the Japanese name 'さとう ゆうこ' (family name first) to romaji and give me the passport format, Hepburn, and western-order versions?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "kana"
     ],
     "properties": {
      "kana": {
       "type": "string",
       "maxLength": 100,
       "description": "Kana reading: \"さとう ゆうこ\" (family given) or a single token"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japanese-kana-name-to-romaji-converter-b1840e98/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-ja-api.onrender.com](https://www.zero.xyz/host/x402-ja-api.onrender.com/llms.txt)