Sagan Tosu announced today, that Kuu is going to be at the home match against Gamba Osaka May 11!
https://www.sagan-tosu.net/news/p/3801/
They celebrate Women's Day on that day with special jerseys and events about women and Kuu will give a kick-in performance before the match.
Sagan was faster than her official site or FC with the info, but should be up there soon as well.