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。
1000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-17
updated
Provider
api.jpverify.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xe4A4E5B226bE71e7b6eD523bc7a91089c770572F",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"max_results": 10,
"postal_code": "100-0001"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"candidate_count": 1,
"data_version": null,
"matches": [
{
"city": "千代田区",
"confidence": 1,
"kana": "トウキョウトチヨダクチヨダ",
"postal_code": "100-0001",
"prefecture": "東京都",
"source": "Japan Post local snapshot",
"town": "千代田"
}
],
"postal_code_match": true,
"query": {
"postal_code": "100-0001"
},
"record_count": 1,
"status": "matched",
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"description": "Provide postal_code or one or more administrative components. / postal_codeまたは行政区・町域の項目を指定します。",
"properties": {
"city": {
"description": "City component. / 市区町村。",
"type": [
"string",
"null"
]
},
"county": {
"description": "County component when applicable. / 郡。",
"type": [
"string",
"null"
]
},
"max_results": {
"default": 10,
"description": "Maximum returned candidates. / 返却候補数の上限。",
"maximum": 50,
"minimum": 1,
"type": "integer"
},
"postal_code": {
"description": "Japan postal code to expand or verify. / 照合・展開する日本郵便番号。",
"pattern": "^\\d{3}-?\\d{4}$",
"type": [
"string",
"null"
]
},
"prefecture": {
"description": "Prefecture component. / 都道府県。",
"type": [
"string",
"null"
]
},
"town": {
"description": "Town or chome component. / 町域・町名。",
"type": [
"string",
"null"
]
},
"ward": {
"description": "Ward component. / 区。",
"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"
}
}
}Use it
curl
curl "https://api.jpverify.com/jp-address/postal-lookup" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.jpverify.com/jp-address/postal-lookup");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://api.jpverify.com/jp-address/postal-lookup")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/4694.json, and this resource appears in /discovery/resources and /discovery/search.