I am a fan who came from Produce48 (a somewhat unusual path, since from what I have seen the tendency is to abandon jpop for kpop, and not the other way around). One of the things that I found most strange about jpop (and still do) is its single release model. After the single is announced, the song randomly comes out on the radio 1 month before the release. The MV is also released by surprise. It is all very abrupt. I would suggest they follow the kpop release model (But correctly, not releasing the MV teaser 2 days before the release.). After announcing a new single, disclose the release schedule together. The date of: 1st, 2nd, 3rd... teaser image; MV teaser; MV; Showcase (That MTV special is a great example, if they could do a 1 hour special like that as showcase on the day of the single's release it would be perfect) It's a simple change, but all this preparation generates hype and buzz, moves the group's name on social media. Using this while other groups in Japan don't use it can give them at least a small advantage.