Also why every people need to remember that none of these 4th gen group had the impact of 3rd gen or 2nd gen
When it's not even OP question
OP is clearly talking in term of amount of kpop act doing well in japan not in term of success overall or impact 😔😔
T-ara had a contract of almost 5m with a japanese company, the highest at that time, and hold a fanmeeting with 3k people. If people forget that when talking about success in Japan imagine how many more groups that achieved similar feats are being ignored?
I think because of recency bias, it looks like 4th gen is doing better.