I spent 2 solid weeks riding niseko. Is an amazing place. Well over run by Aussies now but still worth the trek. The ppl in that country are amazing and the culture is incredible (outside kuta) one night we had 115cm dump. Got on the first chair the next morning and got to the top of the run and couldn't move. WAAAAY too deep. Had to walk back down to get some steep.
I've rode Canada, states, NZ, aus and this was by far the deepest, dryest fliffiest white heaven I have ever had all over my face.
We stayed in a place called mushroom apartments. Nice little place (no luxury) good heating just down the road from the seiko Mart.
If u go, book yourself a back country tour with black diamond tours. And ask him about other local hills.

That guy knows that place like the back of his hand.
He took us to a local hill that we were riding untracked powder from the top of the chairlift at 4pm. There was about 30 other ppl on the hill the day after that massive dump. Honestly didn't think that kind of thing was possible.
Well over waist deep and no one else around.
Ill never forget it.