I'm pretty sure this drummer Shizuo Takahashi is
Shizuo Takasaki from K25G-7154
anisonfan can you check on your copy please if it's written 高崎静夫 instead of 高橋静夫, the second kanji should be different. Image from discogs is too small..
Discogs reports Shizuo Takasaki as 高崎静雄, surely a variation of 高崎静夫.
Since those two album share all performers Akira Ito, Takashi Toyoda, Chepeeto, I think also Kei Ishikawa is a variation of Keiju Ishikawa.