Eh bro, Japanese girls are actually just as SPG as the local sluts are, if not worse.
My time in Australia, I personally saw heaps of Jap girls hooking up angmo guys. The most amazing one was this Jap girl who stayed in my building. First day I saw her, thought she look like some SG girl. 2nd day I saw her she was holding hand with this hairy bogan and didn't know she is Japanese until a friend who knew her told me she is one. It seems like some jap girls like to come over to Australia to study english/ do uni exchange program as an excuse to hook up with angmo dickheads. My Aussie Asian friend told me how he had a great time rubba rubba with Jap chicks in clubs in Tokyo just coz he speak with an aussie accent, wtf....
In contrast, it is actually the PRC Chinese girls that are mostly the conservative ones. They are actually very decent (uni grads) and prefer to hang out with guys of their own ethnicity and some told me they dislike angmo coz they look fierce and dirty hahaha