Japan Finsight

Connect ChatGPT

Works on paid ChatGPT plans: Plus, Pro, Business, and Enterprise. The Free plan doesn't include custom connectors. Setup happens in your browser and takes a couple of minutes.

You'll need your API key. It's the long string starting with jfs_ in the onboarding email the founder sends within 24 hours of your subscription. Copy it rather than retyping it. Haven't received it yet? Email data@japanfinsight.com.

Setup

Custom MCP connectors require a paid ChatGPT plan (Plus, Pro, Business, Enterprise, or Edu) with Developer mode turned on. On Business plans an admin may need to allow custom connectors in workspace permissions.

  1. Turn on Developer mode: ChatGPT Settings, under Security and login. The connector options below only appear once this is on.
  2. Open ChatGPT Settings, then Connectors, then Add custom MCP.
  3. Name: Japan Finsight
  4. In the Server URL field, paste:
    https://mcp.edinet.tools/mcp?api_key=YOUR_API_KEY
    Replace YOUR_API_KEY with your key. The form has no separate field for an API key, which is why the key goes in the URL.
  5. Leave authentication set to none. The key in the URL handles it.
  6. Save. Japan Finsight now appears in your connectors, and its tools are available in new conversations.

Because the key sits in a URL, you can have it replaced anytime. Email data@japanfinsight.com and a fresh key goes out.

Verify the connection

Start a new conversation and ask:

"Using Japan Finsight, list Toyota's top 10 shareholders from its latest annual report."

You should see ChatGPT call the Japan Finsight connector while it works, then answer with named shareholders and stake percentages from the filing. If it answers instantly from general knowledge without showing any connector activity, the connector isn't active in that conversation. Start a new chat and check that Japan Finsight is enabled for it.

Once it works, ask the kind of question the connection is for:

"Across all listed companies, which had a new investor enter the top-10 shareholder register this year?"

That's one question across every listed company's register, for any year back to fiscal 2018.

Troubleshooting