Is it hard to make friends in Japan?

I've heard that it's super difficult from some, but many others tell me that it's not that hard.

I'll be applying to a university in Japan soon, specifically speaking; Tokyo, and I'm nervous that I won't make any friends. I've heard Japanese people are very friendly but their personalities are very straightforward.

I'm very clearly white, and to be honest I'm the embodiment of a westener. I'm quite shy until you befriend me, which doesn't take a lot in all honesty, and then I'm a very loud and eccentric person. But apparently the Japanese aren't keen or fond of loud westeners, which I fear may make it tricky to form friendships.

I've also heard that the newer generations in Japan are becoming more welcoming and accepting, however, which has given me a little hope.

Can anyone tell me about their experience, or their views having lived in Japan/been a Japanese person, or just any advice and tips at all!