Need some help with this picture, I have no idea if this is Kashima with Amatsukaze cosplay or an older Amatsukaze or larger breast.

p sure it's Kashima, yeah

Amatsukaze's hair is usually straight (and longer (although haircuts are a thing)).

Artist commentary:

天津風の服を着た鹿島さんです。

"It's Kashima who wear Amatsukaze's clothes."

Thanks for the assistance, Gollgagh and Cassava.