HojinCheck

Name: HojinCheck
Author: HojinCheck

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HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for "corporate entity"). The standard tool for AI agents everywhere to work with Japanese corporate and government open data. Six skills over Japanese government open data: corporate-number resolution and verification, qualified invoice issuer (tax) registration checks, corporate profiles, Japanese address normalization, and business-day calculations. Every response embeds its data sources and retrieval timestamps. Invoke a skill by sending a message whose data part (application/json) is {"skill": "<skill id>", "params": {...}}; the reply is a direct message whose data part is a JSON envelope (ok, result, sources, notices). Business-level failures (e.g. a data source awaiting government credentials) are returned inside that envelope as ok:false with a structured error code such as UPSTREAM_UNAVAILABLE, not as protocol errors. Tool availability as of 2026-07-14 is stated per skill. API keys are free: self-signup at https://hojincheck.com/signup.

japancorporatecorporate-numberhoujin-bangouverificationkycinvoicetaxcompliancegbizinfocompany-profileopen-dataaddress-normalizationpostal-codeholidaysbusiness-dayscalendar

Declared skills

Resolve Company Name to Corporate Number — Resolve a Japanese company name (tolerant of spelling variants and kana) to corporate-number candidates with confidence scores (0-1, with evidence labels). Source: NTA Corporate Number System Web-API. Status: Implementation complete; awaiting issuance of the government API application ID (applied 2026-07-13, expected late July to late August 2026). Until connected, this tool returns UPSTREAM_UNAVAILABLE (HTTP 503) in production.
Verify Corporate Number — Verify a 13-digit Japanese corporate number (check-digit validated): existence, registered name, head-office address, entity kind and closure status; optional change history. Source: NTA Corporate Number System Web-API. Status: Implementation complete; awaiting issuance of the government API application ID (applied 2026-07-13, expected late July to late August 2026). Until connected, this tool returns UPSTREAM_UNAVAILABLE (HTTP 503) in production.
Verify Qualified Invoice Issuer Registration — Check a qualified invoice issuer registration number (T + 13 digits) against the NTA Invoice Publication System: registration status, registration date, revocation/expiry; optional as-of-date validity and publication history. Confirmation-only by design: input is a registration number only — no name-based search, no reverse lookup, and no list/roster building (restricted by the data source's terms; publication data for sole proprietors is returned in the response only and never cached or stored…
Get Company Profile (gBizINFO) — Corporate profile for a 13-digit Japanese corporate number from gBizINFO REST API v2 (METI): address, representative, capital, employees and more, with per-field source and last-retrieved metadata. Status: Live (connected to gBizINFO REST API v2).
Normalize Japanese Address — Normalize a Japanese address, decompose it to prefecture / municipality / town-aza level, resolve Address-Base-Registry town IDs, and cross-check the postal code (mismatches are reported, not silently fixed). v1 granularity: parsing stops at town/aza level — block/house numbers, lot numbers, koaza and Kyoto street names are returned as an unparsed remainder (no guessing). Sources: Digital Agency Address-Base-Registry + Japan Post postal-code data (bundled local masters). Status: Live (driven by…
Japanese Holidays and Business Days — Japanese national holiday lookup and business-day calculations (Cabinet Office national holiday CSV): is-business-day checks, adding business days, counting business days in a range; optional year-end (Dec 29 - Jan 3) handling. Status: Live (driven by bundled government master data; unaffected by government API outages).

kind A2A Agent Card

name A2A Agent Card

summary A2A Agent Card

version A2A Agent Card

description A2A Agent Card

homepageUrl A2A Agent Card

publisherUrl A2A Agent Card

publisherName A2A Agent Card

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A2A Agent Cardhttps://hojincheck.com/.well-known/agent-card.json

first seen 2 mo ago · fetched 5 d agoopen ↗

Field history (7 recent events)

2 mo ago · declared · summary → "HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for \"corporate entity\"). The standard tool for
2 mo ago · declared · description → "HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for \"corporate entity\"). The standard tool for
2 mo ago · declared · publisherName → "HojinCheck"
2 mo ago · declared · publisherUrl → "https://hojincheck.com"
2 mo ago · declared · homepageUrl → "https://hojincheck.com/docs/en"
2 mo ago · declared · version → "0.1.0"
2 mo ago · declared · protocols → ["a2a"]

when	check	result	http	latency	detail
6 h ago	a2a card	ok	200	55 ms	card: HojinCheck · 6 skills
13 h ago	a2a card	ok	200	44 ms	card: HojinCheck · 6 skills
20 h ago	a2a card	ok	200	20 ms	card: HojinCheck · 6 skills
26 h ago	a2a card	ok	200	153 ms	card: HojinCheck · 6 skills
35 h ago	a2a card	ok	200	66 ms	card: HojinCheck · 6 skills
2 d ago	a2a card	ok	200	18 ms	card: HojinCheck · 6 skills
2 d ago	a2a card	ok	200	59 ms	card: HojinCheck · 6 skills
2 d ago	a2a card	ok	200	63 ms	card: HojinCheck · 6 skills
3 d ago	a2a card	ok	200	35 ms	card: HojinCheck · 6 skills
3 d ago	a2a card	ok	200	33 ms	card: HojinCheck · 6 skills

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