The following is the official website link to query Japan’s blacklist:

The official website of the Immigration Bureau of the Ministry of Justice of Japan: https://www.moj.go.jp/isa/index .html

If you need to query Japan's blacklist, please follow the steps below:

1. Open the official website and select the language "Simplified Chinese" in the upper left corner of the page.

2. Select "Inquiry Service" on the homepage, then select "List of Prohibited Entrants" (blacklist).

3. On the blacklist page, you can enter the name, Romanization (English name) or passport number of the relevant person to query.

4. If you find that someone has been blacklisted, please contact the Japanese Embassy or Consulate in China for assistance.