There may be bigger ski slopes but fewer are as easy to access as Karuizawa. Just a couple minutes from the Karuizawa Shinkansen Station and a 1 hour train ride from Tokyo.
Add to that it's early November opening (Nov 3rd in 2016), being right next to the massive Karuizawa Prince Outlet Mall, and great views of Mt. Asama, it has plenty going for it.
Karuizawa Prince Hotel Ski Area
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