Free JSON APIs

Every dataset on this site is also available as a free JSON API — no key, no sign-up.

Common rules for all endpoints

Rate limit: 30 requests/min and 500/day per IP (HTTP 429 + Retry-After beyond that).
Attribution is mandatory: the page or app using the API must credit the underlying official source (shown in each response's attribution field) and carry a visible link to loreatec.jp (the link_required field).
Do not bulk-scrape these endpoints — the underlying official bulk files are linked from each tool page.
Details & liability: see the API terms.

1. Invoice T-number verification

GET https://bizsearch.loreatec.jp/check.php?num=T5030001144111

Accepts T+13, bare 13-digit corporate numbers and 12-digit registry numbers. Returns status (active/revoked/expired), registered name/address for companies, and the corporate number. Source: NTA, refreshed daily.

2. Company & license search

GET https://bizsearch.loreatec.jp/search.php?q=トヨタ
GET https://bizsearch.loreatec.jp/search.php?q=5030001144111
GET https://bizsearch.loreatec.jp/search.php?type=%EF%BC%A4%EF%BC%B8%E8%AA%8D%E5%AE%9A%E5%88%B6%E5%BA%A6

Three modes: name search over all 5.79M registered companies (kanji/kana/romaji); corporate number → invoice status + licenses & certifications together; license type → holder list. Sources: NTA, 法人番号公表サイト, gBizINFO, GEPS.

3. Japan Customs FX rates

GET https://bizsearch.loreatec.jp/fx/api/latest.json
GET https://bizsearch.loreatec.jp/fx/api/2026-32.json (ISO week)

The official weekly customs exchange rates used for import valuation, plus an embeddable widget — see the FX tool page. Source: Japan Customs.

4. Giteki (radio certification) lookup

GET https://bizsearch.loreatec.jp/giteki/api/verify.json?num=CERT-NUMBER

Verifies a radio-equipment certification number against the MIC database (351k records, nightly sync). Source: Ministry of Internal Affairs and Communications.

5. Japan address toolkit

GET https://bizsearch.loreatec.jp/address/api/convert.json?zip=1000001&addr=...
GET https://bizsearch.loreatec.jp/address/v1/zip/100.json (static shards, CORS-enabled)

Postal-code lookup and kanji→English address conversion. Source: Japan Post KEN_ALL / ROME data.

Read the API terms →