You tried going to https://www.suzuran-kai.org/events/categories/sodoku-events/03kyusyu-area/fukuoka/, and it doesn't exist. All is not lost! You can search for what you're looking for.
https://www.suzuran-kai.org/events/categories/sodoku-events/03kyusyu-area/fukuoka/
https://www.facebook.com/sodokukai/