cut 3 is sato, effects redrawn by kigami as fx AD (uncredited). they note despite sato's effects getting redrawn on the OP, his skill gained kigami's trust, so he didn't touch the effects in many swimming cuts sato later does on afterwards
source: free creation notebook vol 1

c1: takahashi
c2: urata
c3: sato
c4: akitake
c5: sawa