Well, there is a subforum strictly for K-1 and kickboxing
K-1, Kickboxing - MMA News Forums
It has certainly lowered in profile since the downturn in MMA popularity in Japan, but as far as I know they're still doing strong enough ratings that they will continue to air on television. On a local level, K-1 is still massively popular in many places around the world. they sold 25,000 tickets to their last event in Amsterdam if I recall correctly