Japan public data: corporate numbers, registered support organizations, government bid notices.
Scored across 3 tools
The three tools target completely different datasets: corporate registry lookup, government procurement notices, and registered support organizations. Names and descriptions make the boundaries explicit, with no plausible case where an agent would pick the wrong one.
All three follow a verb_noun snake_case pattern (lookup_corporate_number, search_local_govt_bids, search_support_orgs). The only deviation is 'lookup' vs 'search', but this is semantically motivated by identifier-based retrieval versus query-based search.
Three tools map exactly to the three advertised data sources, so nothing feels padded or redundant. It is slightly thin — each dataset is served by a single search operation with no companion detail tool — but that matches the read-only aggregation purpose.
Each data source is covered for its main retrieval use case (search by identifier, keyword, region, language), which is the core need for these registries. Minor gaps exist, such as no fetch-by-notice-ID for bids or metadata/prefecture-enumeration helpers, but returned URLs and bundled data let agents work around them.
Look up Japanese companies in the National Tax Agency Corporate Number Publication Site. Search by 13-digit corporate number, or by company name. Returns name, address and status. 国税庁 法人番号公表サイトから、法人番号（13桁）または法人名で法人情報（名称・所在地・閉鎖有無）を検索します。
Inputs: name, number.
Search bid and tender notices from Japanese local governments and national agencies via the KKJ (官公需情報ポータルサイト) search API by the Small and Medium Enterprise Agency. Filter by keywords (AND), prefecture, issuing organization and notice date. Returns title, organization, dates and the notice URL. 官公需情報ポータルサイトの検索APIで、自治体・国の機関の入札・公募情報をキーワード・都道府県・機関名・公告日で検索します。
Inputs: limit, query, since, prefecture, +1 more.
Search the Immigration Services Agency of Japan registry of Registered Support Organizations for Specified Skilled Workers. Filter by name, location (prefecture/city in head office or support office address) and supported language. Organizations that reported suspension are excluded unless includeSuspended is true. 出入国在留管理庁「登録支援機関登録簿」から、特定技能外国人の登録支援機関を名称・所在地・対応言語で検索します（同梱データ・基準日あり）。
Inputs: name, limit, language, location, +1 more.
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Search Japanese subsidies and public company data using J-Grants, gBizINFO, and EDINET.
Verify Japanese companies, invoice-issuer registrations and addresses against government open data.
gBizINFO — Japanese corporate registry, from METI (経済産業省).
Japanese public-sector business opportunities for AI agents: tenders, subsidies, sanctions. x402.
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