I'll have to respectfully disagree, I think that Phil Spencer and the Xbox team have done a fine job all things considered of bringing Japanese titles to the platform, especially over the 2nd half of the Xbox One's lifespan and I expect such efforts to continue with Scarlett. Capcom, SEGA, Bandai Namco, Koei Tecmo and a few other offshoots have done a good job of bringing games to the platform if not a significant portion of their output. They've also done well with securing a variety of Korean titles (Black Desert, Bless Unleashed, Hyper Universe, Crossfire, etc.). With regards to niche titles, it's a completely unreasonable criticism IMO given Xbox One's place in the Japanese market and you know that they will never be 1:1 with Sony/Nintendo in terms of Japanese releases. I think the baseline expectation for Xbox and Japan should be whether or not Microsoft is securing most of Japan's biggest games.
A lot of Xbox fans who like Japanese games pine for the days of the XOG and X360 days and yeah they were damn great, but outside of market realities at the time that was a completely different leadership team back then. Ed Fries, Seamus Blackley, Kevin Bachus, Peter Moore, J Allard, Shane Kim, etc. As has been noted many times, Fries, Blackley and Bachus championed hard as hell in wanting to secure Japanese games on the Xbox. It was hard for them to forge those relationships back then and when those folks left and Microsoft failed to continue building those roads it was going to be long way back.
In all, I'll restate that I think given market realities Xbox is doing a good job of securing Japanese support for platform. If you won't be satisfied until they get JP support on par with Sony or Nintendo I'll tell you right now that's never going to happen. For me, though I own all platforms and while I don't buy all of my Japanese titles on the Xbox I am appreciative that I get the option to purchase what Japanese games do come over on the Xbox.