Okay, my favorite Japanese synth-pop record is “Ich Weis Nicht Mehr” by Evelyn and Masao. Evelyn and Masao is a project led by Masao Hiruma, and after his legendary project Testpattern had ended, he enlisted French-American model Evelyn and started recording in his home studio. These home recordings were later compiled and reissued by Dark Entries. These are all very fantastic. If you’re looking for dark, retro Japanese electronic music, you should definitely check them out, it’s all great.
evelynemasao.bandcamp.com