Japan Business Tools

Name: Japan Business Tools
Author: jp.ossalt

MCP serverMCP

Japanese holidays, business days, eras, postal codes, addresses and corporate numbers.

by jp.ossaltv0.9.0

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30-day availability60/60 checks ok

when	check	result	http	latency	detail
1 h ago	mcp initialize	ok	200	25 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
8 h ago	mcp initialize	ok	200	58 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
14 h ago	mcp initialize	ok	200	97 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
21 h ago	mcp initialize	ok	200	25 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
28 h ago	mcp initialize	ok	200	34 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
35 h ago	mcp initialize	ok	200	119 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
2 d ago	mcp initialize	ok	200	57 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
2 d ago	mcp initialize	ok	200	28 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
2 d ago	mcp initialize	ok	200	37 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools
3 d ago	mcp initialize	ok	200	65 ms	server jp-biz-tools 0.9.0 · protocol 2025-06-18 · 13 tools

Tools observed via MCP handshake

list_holidays — List all Japanese national holidays and substitute holidays for a year, based on the National Holidays Act and verified against the Cabinet Office CSV. Each hol
check_business_day — Check whether a date is a business day in Japan, and if not, why (weekend, holiday name, bank closure, or a custom closed day). `reason` is Japanese text; `reas
add_business_days — Return the date that is N business days after (or before, if N is negative) the given date. The start date itself is not counted; e.g. 1 business day after a Fr
count_business_days — Count business days from start to end, inclusive of both ends. Returns 0 if start is after end. The period can be up to 3,660 days (about 10 years). / start から
adjust_to_business_day — If the date is a business day, return it as is; otherwise move to the next ("next") or previous ("previous") business day. Useful for payment due dates that fal
last_business_day_of_month — Return the last business day of the given month. / その月の最終営業日。
to_japanese_era — Convert a Gregorian date (YYYY-MM-DD) to the Japanese era calendar, e.g. 2026-10-07 → 令和8年10月7日 (wareki_short R8.10.07, zero-padded). Year 1 is written 元年. Supp
from_japanese_era — Convert a Japanese era date to YYYY-MM-DD. Accepts 令和8年10月7日, 令和元年5月1日, R8.10.7, H31/4/30, Reiwa 8.10.7, kanji numerals (昭和六十四年一月七日), a trailing weekday such as
lookup_postal_code — Look up the address (prefecture, city, town) for a 7-digit Japanese postal code, from Japan Post data. Accepts forms like 1000001, 100-0001 or 〒100-0001. One co
search_postal_code — Find Japanese postal codes by prefecture, city and (optionally) part of the town name, from Japan Post data. The city must be the full municipality name (e.g. 札
normalize_address — Split a Japanese address into prefecture, city, town and the rest (block numbers, building), matching Japan Post's address data, and return candidate postal cod
lookup_corporate_number — Look up a 13-digit Japanese corporate number (法人番号) in the National Tax Agency's monthly bulk data: name, furigana, English name, kind, registered address and p
search_corporation_by_name — Find Japanese corporations whose name starts with the given text (prefix match), in the National Tax Agency's monthly bulk data. Legal-form words such as 株式会社 o

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Official MCP Registryjp.ossalt/jp-biz-tools

first seen 16 d ago · fetched 16 h agoopen ↗

Field history (5 recent events)

16 d ago · declared · summary → "Japanese holidays, business days, eras, postal codes, addresses and corporate numbers."
16 d ago · declared · description → "Japanese holidays, business days, eras, postal codes, addresses and corporate numbers."
16 d ago · declared · publisherName → "jp.ossalt"
16 d ago · declared · version → "0.9.0"
16 d ago · declared · protocols → ["mcp"]

Japan Business Tools

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