Generally speaking, Japan FSA-regulated broker profile will be found at the List of licensed(registered)Financial Institutions page on Japan FSA website. Try to find it and check if it will match the info from the broker website.
The detailed steps are as follow:
1. Find the licensed/reference no.(preferred) or name of the forex broker, which you can get from the broker's website;
2. Download Financial Instruments Business Operators list and try to search the broker's name in the list.
https://www.fsa.go.jp/en/regulated/licensed/index.html#03;

3. If the broker's name is not in the list, it means that it may be an unauthorized broker and please watch out it.
If yes, the next step you need to do is to check the broker has the authorization to provide financial service of 'Type I Financial Instruments Business' ;

4. If all the above steps have been done, don't forget to check the most important information: check if the broker details in the Japan FSA list matches the ones you'll go to trade with, especially the website and email etc. If no, please keep away the broker because it's probably an unauthorized firm and your money will fall in danger.
