Yeah, there's a performative aspect to Aketagawa's playing that is somewhat lost on the LPs, but he is indeed good. Angry Waves is brilliant -- I have an original of that one and think it's a sleeper hit within Takayanagi's large and wide-ranging discography.
Johnny's Disk was/is connected to the jazz cafe/club Kaiunbashi No Johnny in Iwate. The Eiji Nakayama records on the label are intensely introspective post-bop, and very strong, and there's "Lee Won Hui" aka Mototeru Takagi, "Grow," which is a beautifully out soprano (mostly) and drums duo. Those are the dates I'm familiar with, but there's certainly more that I don't know.