I checked and it doesn't look like either the English or Japanese version of Lolo 3 has end credits, so while Ishikawa + Kanazashi is plausible, I'm skeptical about the attribution without additional evidence.
This may or may not mean anything, but I didn't see any of the bigger Japanese references crediting Ishikawa for Lolo 3 (
[1] [2] [3]); it only seems to be English sites.