Grazza, Go to the following links:
http://akakura-ski.com/coupon/11coupon_1day.htmlhttp://akakura-ski.com/coupon/11coupon_lucky.htmlPrint out the coupons and hand one in at the Akakura Onsen lift ticket office when you buy your pass.
The first one means you get a ticket for 3,800 + discount on rentals 20% and ski school 10% + an onsen at Landmark for Y300 (normally 1,000) and at a local onsen in Akakura for 400 (not sure which ones). 12 and under get the same deal for 2,800
The second is 1,000 back on a lift ticket - but only on the days listed.
I can't find the coupon page at the Akakura Kanko page. Sorry, it only lists the lift prices there. They have had coupons in past years. You could likely pick up one from the tourist office by the station or look for a deal at the local 7/11. In both cases you'll most likely need some Japanese though.
Cheers, MG