If Kamogawa's scene wasn't already confirmed I'd have thought at least the cut from 8-10 secs was his, maybe even the BG animation cuts prior

Then again there's no other animator credited on the ep I can think of who draws smoke like that (and it's possible that he could have animated multiple scenes considering he did so for R2 #14)

fwiw 3- end looks more like Kamogawa than the other scene he's tagged on does

it's possible its wrong since there's no source for it on his page, looks like a guess instead

https://w.atwiki.jp/sakuga/?cmd=word&word=%E9%B4%A8%E5%B7%9D%E6%B5%A9&type=&pageid=148