Don't even bother with the lower runs unless you're an expert at dodging people.
Thankfully if you make the trek to the upper parts there's enough breathing room. Also, for snowboarders- the beginner's slopes here are so flat you'd wish you had ski poles. The pink (beginner/intermediate) were nice and plentiful. The reds (intermediate) would be black at other resorts. I am still not good enough to really go down them but I reckon the adequate snowboarder will enjoy them. And for you hard-core people, sadly there are only 2 (I believe) black runs.
A final disgruntlement for those driving - the only way there is using their toll road which is only a couple km, but charge 900 yen - on top of a 4500 lift ticket and a lot of the runs unusable due to heavy, heavy traffic made me think it was more than it's worth.