The nice thing about ALTS is that it's too far for most people in Tokyo. That means less crowds on many lifts, but you have to get out of the main area.
There are several mountains and to get to my favorite, you have to go up and down a few times to get to the far left which has three lifts with few people. The runs maybe short, but they're a lot of fun.
I love it. There are lots of tree runs and great powder lines if you dare to venture off of the groomed runs. Like all of Japan, there are lots of closed areas, and I was given the "soko wa cosu ja nai desu yo" a few times, but it was hard to resist.
The parks are dope, as this is the place for the 2005 Nippon Open. The super pipe was not finished/open yet, but there were lots of jibs,