Connect Corporate Number Publication Site (Houjin Bangou) to Gemini Enterprise
Query Corporate Number Publication Site (Houjin Bangou) directly from Gemini Enterprise. Arlet links the two through one MCP connection and takes care of API keys.
This server connects your AI client to the Corporate Number System Web API (Version 4) operated by Japan's National Tax Agency. Every registered corporation in Japan has a unique 13-digit corporate number, and this API is the authoritative source for the mapping between numbers, registered names, and head-office addresses.
Key features:
- Search corporations by name (prefix or partial match), optionally narrowed by prefecture/municipality.
- Resolve up to 10 corporate numbers at once to their registered name, address, corporation kind, and change/closure history.
Because the corporate number is the common key used by gBizINFO, EDINET, procurement data, and most other Japanese business datasets, this API is the natural first step for entity resolution: find the right corporate number first, then join everything else onto it.
Using the API requires a free application ID (γ’γγͺγ±γΌγ·γ§γ³ID) issued by the NTA; apply on the Web API page of the Corporate Number Publication Site. Set it as HOUJIN_BANGOU_APP_ID in your Arlet environment variables.
How to connect Corporate Number Publication Site (Houjin Bangou) to Gemini Enterprise
- 1
In the Arlet dashboard, open Data tools, find Corporate Number Publication Site (Houjin Bangou), set the API key issued by Corporate Number Publication Site (Houjin Bangou) and switch it on.
- 2
Sign in to Gemini Enterprise with your organization Google account and open the gear icon at the bottom left β Connectors β Add MCP Server.
- 3
In the MCP info tab, enter https://mcp.arlet.dev/mcp/ as the Server URL and "Arlet" as the Name. In the Auth tab, enter the OAuth settings from the Arlet docs (Authorization URL / Token URL / Client ID / Client Secret / Scopes) and click Add.
- 4
In the connector list on the chat screen, click Connect on Arlet, sign in with Google and authorize. Arlet can then be enabled with the toggle.
Adding custom connectors (MCP) requires a Gemini Enterprise subscription and is not available in the consumer Gemini app. See the docs for the values to enter in the Auth tab.