Hey i noticed you made that figure page for collecting purposes, I figured i'd drop the link to that Mercari listing where the Japanese release of the Happy Hangout was sold:
It seems like it's a much rarer release than the Italian/North American versions, even when you look up ハム太郎コンパクト you get results for different toys
Thank you for finding all that info. I’ll look into those “Jr.” sets at some point too. Odd that the Japanese list you found is still missing the other IDs, I guess those numbers really were skipped...