Should definitely seed with recruiters in Japan. It's still a huge part of finding a job there. Robert Walters, Robert Half, Hays and more.

Also, is this intended for individual recruiters as well or just agencies?

Can you add a specific rating around if they respect your time? Don't think we need a 30 min call for you to finally reveal the role to me!

Added. More agencies than individual. Wanted to start with a basic option which would be straightforward without registration. Later could add more features.