GuttyKreum made quite a few Japan theme tileset packs, but sadly they're 32x32 and pixel style which I like but with the style you have, it wouldn't work imo. I recently saw a Youtuber who created a 1980s studio theme. He has a good example of that old, retro, and nostalgic feel to it all while including modern assets from Japan today's time. Kabukicho is a good example of the nightlife and how the amazing colours project off the neon signs. Hard to say tbh.