I’ll answer your question with no context, and then with some, based on my experience living and working in Japan at Japanese (i.e., local) tech businesses for the past 8 years.
No context answer: the level of commitment is slim to none. It’s not even a blip on the radar. If anything, hiring of non-Japanese is only done — and this is made abundantly clear — for the express purpose of exploiting business opportunity.
Answer with some context: it’s not a blip on the radar because it just doesn’t have to be. The country is ninety something percent Japanese. Diversity isn’t a thing that people are very concerned with, because they’re not faced with it on a daily basis.
The U.S. has a very unique set of individuals living in it’s country in that heterogeneity is the norm or at least the assumed norm. Therefore issues like diversity are hot topics. It would be wrong to assume that just because a group of Asian minorities in the U.S. experience some level of cultural insensitivity, that their home institutions would recognize this or bat an eyelash at it. Comparing the two is like night and day. And it’s also wrong for Americans, Western Europeans, or anyone to come to these countries and demand that they be respected as equal, demand that they be included, or expect that people will treat them the same. It’s just not going to happen. We have to stop assuming that certain standards in place in the U.S. — while they might lead the world in their foresight owing to the fact that we have such an experimental, forward-looking and diverse society — will be or should be immediately recognized and adopted the world throughout. It took time to get them in place in the U.S. — for people super passionate about these causes, they should adopt an attitude of education rather than one of criticism.