Hokkaido: If the northernmost island, and the site of the Winter Olympics 1972, Hokkaido has many ski resorts known for their deep powder.
Mount Niseko. Resort Grand Hirafu
Be Named "snowiest ski resort in the world" (with a grudging concession to the recent snow Monte erratic. Baker), the beautiful resort of Hokkaido is a few hours from Sapporo by train.
Adult Full Day Lift Ticket: 4,800
Kamui Ski Links Area
Hokkaido This resort is easy on your wallet. It is an hour drive from Sapporo by train. While Kamui slopes are not as long and numerous as some of the most popular resorts, it still offers great trails for all levels, without the crowded tourist-ness elsewhere that may occur.
Adult Full Day Lift Ticket: 3,000
Honshu: If you want something a little more accessible to Tokyo, Honshu offers numerous opportunities for skiing. Hakkoda Ski Resort
For intermediate skiers to advanced, Tohuku this resort has it all. Great snow, small crowds (especially on weekdays), and good racing. 5 Travel package: 4900 (There is a second company lift a 1-day ticket for 3000 specials)
Nozawa Onsen Snow Resort
This ski resort of Nagano is more than just a great skiing experience. It is a cultural city offers excellent onsens (no surprise), traditional accommodation, delicious food and a famous fire festival. A trip shinkansen from Tokyo to Nagano is a little less than 2 hours. Then get Nagano Nozawa is only one hour by bus or train.
Adult Full Day Lift Ticket: 4,600
If these options do not conform to your account or travel plans, there are plenty of other resorts (over 500!)