Minakami is good. This was only the second place I've been to in Japan, so I can't really compare it to much, but despite looking pretty small, there are quite a few long runs here.
As other said, there are lots of runs for different skill levels, however I had one problem. I'm not a great skier, but I got bored on the beginner hills, and then found the "intermediate" runs much too hard. There was a HUGE gap in necessary
For a relatively small resort Houdaigi has lots to offer in terms of terrain, length of runs and snow quality. The majority of the mountain is geared towards beginners and intermediates with some nice long runs by Japan standards. That said, there are some steeps up top with very fun tree and off-piste sections.
The views from the top of Lift 9 are amazing on a bluebird day which I had the pleasure of experiencing.