Japanese postal-code lookup and reverse lookup
Japanese postal-code lookup and reverse lookup. Keywords: Japanese postal lookup, Japan Post postal code, postal code reverse lookup, 日本郵便番号検索. Use a postal code or prefecture/city/ward/town components against the local Japan Post snapshot. / 通过邮编或都道府县、市区町村、区、町名字段，在本地 Japan Post 数据中进行日本邮编反查。
Answeringour last check, 2026-09-24
1 of 1checks answered this week
362 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.jpverify.com/jp-address/postal-lookup
| Category | Code and developer |
|---|---|
| Provider host | api.jpverify.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 362 ms |
Example input (from the provider)
{
"body": {
"max_results": 10,
"postal_code": "100-0001"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"description": "Provide postal_code or one or more administrative components. / postal_code\u307e\u305f\u306f\u884c\u653f\u533a\u30fb\u753a\u57df\u306e\u9805\u76ee\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002",
"properties": {
"city": {
"description": "City component. / \u5e02\u533a\u753a\u6751\u3002",
"type": [
"string",
"null"
]
},
"county": {
"description": "County component when applicable. / \u90e1\u3002",
"type": [
"string",
"null"
]
},
"max_results": {
"default": 10,
"description": "Maximum returned candidates. / \u8fd4\u5374\u5019\u88dc\u6570\u306e\u4e0a\u9650\u3002",
"maximum": 50,
"minimum": 1,
"type": "integer"
},
"postal_code": {
"description": "Japan postal code to expand or verify. / \u7167\u5408\u30fb\u5c55\u958b\u3059\u308b\u65e5\u672c\u90f5\u4fbf\u756a\u53f7\u3002",
"pattern": "^\\d{3}-?\\d{4}$",
"type": [
"string",
"null"
]
},
"prefecture": {
"description": "Prefecture component. / \u90fd\u9053\u5e9c\u770c\u3002",
"type": [
"string",
"null"
]
},
"town": {
"description": "Town or chome component. / \u753a\u57df\u30fb\u753a\u540d\u3002",
"type": [
"string",
"null"
]
},
"ward": {
"description": "Ward component. / \u533a\u3002",
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"candidate_count": {
"type": "integer"
},
"data_version": {
"type": [
"string",
"null"
]
},
"matches": {
"items": {
"properties": {
"city": {
"type": "string"
},
"confidence": {
"type": "number"
},
"kana": {
"type": [
"string",
"null"
]
},
"postal_code": {
"type": "string"
},
"prefecture": {
"type": "string"
},
"source": {
"type": "string"
},
"town": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"postal_code_match": {
"type": [
"boolean",
"null"
]
},
"query": {
"type": "object"
},
"record_count": {
"type": "integer"
},
"status": {
"type": "string"
},
"type": "object",
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}