Is it easy to meet other foreigners/expats?

Planning a move to Osaka from the US. I expect it will be difficult to build relationships with Japanese people, but wondering how easy/hard it is to get to know other expats. I assume it will require me getting out and exploring hobbies and activities to meet people—but are people generally friendly and welcoming?

If you’re a foreigner living in Japan, how did you go about building friendships? Was it difficult?

Thanks for anything you’re willing to share.