Japan and dating
I’ve been living here since 6 months now and I didn’t have a serious date yet.
‘In Germany I never been single for longer than a few months, I had never had problems about dating a guy.
Since he didn’t specify what made him think that girls of his age were childish I can only speculate, but if he doesn’t make effort to unlearn his cultural values and learn new sets of values, he is likely to continue having difficulty.
I’m not saying he should adapt himself completely; it’s ultimately his choice.
However, there are many people who are successful at dating in Japan.
Many people provided counter-examples in the comments.