Basically zero Japanese music is on Spotify. Only way to listen to it is to buy the old LPs or CDs if there happens to have been a CD release, or use a p2p program to download a vinyl or CD rip if anyone's made any. This song is from a 1991 album 'Earthian Air' which was also re-released in 2007, no doubt to cash in on his recent death. All I can find for it are ancient store pages, and a few overpriced used copies on Amazon. I can't find it on p2p either, very little of him at all unfortunately, as he released a ton of stuff.
The lofi song is " Jrd - slowly " its weird it sounded familiar and i was like oh wait that sounds like the piano from the Cole song, so i went to genius and saw the sample and now im hear lmao I was checking the comments to see if anyone else heard the lofi song too