Australia here. About 20 years ago I asked my Japanese[0] girlfriend why I saw a lot of (i.e. white) Australian guys with Japanese girlfriends, but hardly any Japanese guys with Australian girlfriends. She said with a huge laugh that Japanese guys are really afraid of Australian girls! hehe.

I thought I understood that's because Aussie girls generally would seem loud, opinionated, immodest, over-assertive, disrespectful, compared with the Japanese feminine ideal, or even the masculine ideal. And Japanese males are often..more sensitive, artistic, considerate, reflective etc - not traditional Australian male virtues!

[0] i.e. Born in Japan, here since fairly young.