Japans tier 2 scene is very successful independently.
Thanks to that, some of the good upcoming japanese talent such as aace choose to stay and other actually good players like dep decide to go down

Lastly Japan just doesn't make a super team
You could probably make a solid team that can play for a masters spot if you took the best of zeta dfm and the top tier 2 talent in Japan

But they don't seem to do so

The problem is coaching has a lot of intangibles.
You can't know how mini affected boasters igling
You can't know how minis coaching affected the remaining fanatic roster after 2023 and how it shaped their structure of play
You can't know how he affected the way Milan coaches (considering they worked together)

There are to many thing that mini could have or couldn't have affected

The facts are
Mini won 2023 straight up

Where other super teams like 2024lev or 2025 vit failed
Mini succeeded he had a super team and got the results of a super team