There were a lot of good specials with boards discounted by 20-30%.
They have a waxing service at Murasaki Sports. Guy says that if you buy your snowboard from them you get free base wax forever. Pretty cool.
Murasaki sports in the Parco shopping centre in Sapporo city has every thing a snowboarder could want. Large range of boards, bindings, boots, gear and apparel. Some good discounts in the outlet section. They even have a tuning station.