I don't usually put much into the algorithm from YouTube. But I still take a listen to suggestions. The first few tracks (I don't remember which now) from Banshimoku were good enough for me to keep listening, but I wasn't sure. Then I listened to バトルカメ (translated to Battle Turtle). That one won me over, and I decided to put them into a rotation instead of just exploration.
It's a shame that they don't have a presence on bandcamp.com nor discogs.com. YouTube has a lot of stuff. Amazon (link 1, link 2) does too.
From what I can research, they started as a trio of vocalist/guitarist Shion Chiga, drummer Yamato Iohara, and bassist Yuhei. Yuhei left in 2024, and they've kept going without a bass player when composing, but have used various bass players when touring.
But beyond that, I'll write more as I get to know them better. Right now, cool alt/punk rock. Often fun, driving. Shion's vocals are definitely unique in a good way. Very pronounced, distinct and "in your face" without being aggressive or overbearing.