I found the Frame hotel in Sapporo to be the perfect place to relax after a long days snowboarding.. The single room I booked had everything you could ask for, comfortable bed, deep bath/shower (oh so good to run a long hot bath) ample supplies of body wash/shampoo/conditioner.. Friendly staff who put up with my almost complete lack of Japanese, I was able to get by pretty well (lots of giggles, smiles and nods) There are many free rental-able items, such as the kettle I grabbed for my caffeine fixes, though others such as an iron, or hair straightener etc.
There is also a communal onsen style bath which I didn't try, but I'm sure it's really nice.. :) Drinks vending machine on each level for your Coke or flavoured water fixes, and a 7-11 convenience store literally across the street if you feel like a midnight snack.. The hotel itself is also very close to many restaurants and the station is easily within walking distance.. The only thing I would suggest if you're staying here during Sapporo's chilly winters would be a pair of either snow spikes (rubberised ice cleats that pull over your shoes) or show shoes themselves, as the streets get a tad icey and VERY slippery.. All in all, a great place to check out.. :)