Is it normal to not have common friends with your japanese husband?

So my husband(32M) goes out once in a while with his workmates and college friends. We have a son(3M).

In my POV(32F), i want my husband to meet my friends, and do playdates with my son’s friend’s family. However he’s not keen to that. And told me why not just mom and kid playdate and not involve the dads?

He said that japanese dont really do that. Like your friend is your friend, my friend is mine. We dont introduce wives or even show photos of them to their friends or social media. But i feel like we need common friends, like who we can invite over or do thins together?