@pulpo that boogie one is titled “Wa Boogie” - basically a guide to boogie-styled of Japan from late 70s to now. Quite a handy.
For benefit of other forum readers, this kind guy “low-bay” has managed to create the full list of the 1st Obscure Sounds releases per category. Check his list here:
https://www.discogs.com/user/low-bay/lists