@vivek081166
基本信息
MCP server exposing Japan-specific utilities (era conversion, romaji, holidays, postal codes, kana, name split) to AI agents.
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"japan-utils": {
"command": "uvx",
"args": [
"japan-utils-mcp"
]
}
}
}`令和8年` / `R8` / `Reiwa 8` / `令和元年` → Gregorian year + era metadata
`2026` → era kanji (`令和`), English (`Reiwa`), year-of-era (`8`), formatted strings
Mixed Japanese text → Hepburn romaji + hiragana reading
7-digit JP postal code → prefecture / city / area, with kana readings
Date string → is it a national holiday? + Japanese name + weekday
Year → all national holidays for that year
hiragana ↔ katakana ↔ half-width katakana, any direction
Full-width ↔ half-width for ASCII, digits, kana (with per-category control)
Japanese full name → surname + given name (statistical model with confidence)
Japan Utils Mcp is an MCP (Model Context Protocol) server that exposes Japan-specific utilities to AI agents like Claude, Cursor, Cline, and Continue. It provides deterministic tools for tasks such as Japanese era-to-western year conversion, kanji-to-romaji transliteration, postal code lookup, national holiday queries, kana conversion, width normalization, and Japanese name splitting. It is built on well-maintained Japanese libraries (jpholiday, posuto, pykakasi, jaconv, namedivider-python) and wrapped as MCP tools for reliable, non-hallucinated answers.
Install and run via uvx japan-utils-mcp (recommended, no install needed). Alternatively, clone the source repository, sync dependencies with uv sync, and run uv run japan-utils-mcp. Configure the server in your MCP client (e.g., Claude Desktop, Claude Code, Cursor) by adding a JSON entry with the uvx command and japan-utils-mcp argument to the client’s MCP configuration file.
Generic LLMs often hallucinate on Japan-specific data such as era arithmetic, romaji readings, postal addresses, and holidays. Japan Utils Mcp provides deterministic answers backed by well-maintained Japanese libraries, eliminating guesswork.
The server requires Python and is designed to run via `uvx` from the `uv` tool. Dependencies (including `jpholiday`, `posuto`, `pykakasi`, etc.) are automatically resolved. Data is shipped locally; no external API calls or cloud services are needed.
Postal code data is provided by the `posuto` library, which is refreshed against Japan Post's monthly KEN_ALL dataset. For ultra-fresh data, users should periodically update `posuto`.
No — it covers only national holidays (国民の祝日). Company-specific holidays, regional observances, and other non-national events are not included.
Era conversion supports Meiji (明治) through Reiwa (令和). Earlier eras (before Meiji) are not supported.
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