Rain Temple, by 2814
8 track album
Youtube version: https://www.youtube.com/watch?v=7eRf__n7VPg
Apple version: https://music.apple.com/us/album/rain-temple/1131827990
Yay! this is a gorgeous album
Unfortunately it seems all of their other stuff is more standard house beats. So this album is more of an anomaly than the norm. Been chasing similar sounds trying to recreate the feeling I had first discovering this album, and failing :)
Have you listened to スリープ 研究 プログラム by Woob? It's not exactly the same but gives me a similar vibe.