I'm not a huge Japanese jazz aficionado, but this is some stuff I've found over the years and enjoyed:

• Himiko Kikuchi - Flying Beagle
• Masayoshi Takanaka - All Of Me
• Jiro Inagaki - ファンキー・スタッフ (Funky Stuff)

If you like jazzy stuff in general, maybe you'd like:

• Lund Quartet - Lund Quartet
• Portico Quartet - Memory Streams
• Colin Stetson - All This I Do For Glory
• BADBADNOTGOOD - IV
• Snarky Puppy - Lingus

https://everynoise.com/engenremap-japanesejazzfusion.html

Everynoise is the website for exploring genres. Warning: Time will fly.

Give Takanaka a try.

If you want something a bit different, Gypsy Jazz is really fun. Kinda a jazzy swing sound with a touch of bluegrass/americana mixed in.

My dad's super big into it but the band I always remember is Harmonious Wail

Ryo Fukui

The Album "Scenery" is a ride. I don't know much about the genre/scene tbh, but this album cuts through whatever I'm experiencing at the time. It really feels like unfettered expression, and it sounds really pretty.

Also, the dude was insane on the keys. How the hell someone's hands can do half of that stuff is beyond me.

Not the person you responded to, but I got super into Haruomi Hosono last year. Sort of 70's Japanese electronic jazz. Hosono House and Paraiso are great albums. He also contributed to Pacific, and it's a great jumping off point for all the other artists on that record.

Cornelius is another really fun Japanese electro band, found them on an old episode of Yo Gabba Gabba.

Quite unrelated, but if you're into hip hop Mr Giscard was a fun find for me. It's in French, which I don't speak, so can't speak to the lyrical content, but it's a fun listen. Similarly, Lous and the Yakuza, this time in German.

Happy listening!

I'm not very knowledgeable on J-Jazz, but BBE records has a bunch of compilations and re-releases. I really enjoyed this comp by DJ Muro.

https://bbemusic.bandcamp.com/album/diggers-dozen-dj-muro

Satellite Lovers was a nice band. Their music sounds so carefree.