Good evening

I would like to read some comments about MBA at Japan. Are they very local? Is it worth to go there if you are expecting to work outside Japan/Asia? or it only makes sense if you wish to relocate to Japan
I am particularly interested in International University of Japan.

Hi, I can't help you out with any first hand information, and I didn't do any specific research about MBAs in Japan.

But what I have heard and the impression I got from what I read in the web is the same as you say: Japanese MBAs target Japanese essentially, it makes sens mainly if you intend to work in Japan afterwards.
I don't think that MBAs in Japan have a very international orientation. Also, they are not very present in the rankings, if not at all - I didn't check it though.