Japanese Address Normalizer & Verifier (MCP Server)

An MCP server that normalizes and verifies Japanese postal addresses. Splits messy Japanese address strings (full-width characters, mixed hyphens, romaji, building/room names) into structured fields, with a verification flag and lat/lng.

Built for AI agents doing cross-border commerce, logistics, or CRM involving Japan.

Endpoint (remote, no install)

Streamable HTTP:https://jp-addr.streamfront.net/mcp

Tool

normalize_jp_address

Structure & verify a raw Japanese address string.

Input: { "address": "東京都新宿区西新宿2-8-1 パークタワー1503号" }

Output (example):

{
  "ok": true,
  "normalized": {
    "pref": "東京都", "city": "新宿区", "town": "西新宿二丁目",
    "banchi": "8-1", "building": "パークタワー", "room": "1503"
  },
  "geo": { "lat": 35.68945, "lng": 139.691774 },
  "level": 3, "verified": true
}

How it works

Wraps the open-source @geolonia/normalize-japanese-addresses engine and adds a preprocessing/structuring layer: full-width→half-width, hyphen normalization, chome/banchi boundary detection via engine metadata, building & room separation, and a verification flag.

Status

Early. Single tool. Tested mainly on residential/urban addresses. Feedback welcome.

Registry

Published to the official MCP Registry as net.streamfront/jp-address.