X-JAM Takaifuji sits on the eastern slopes of Mt. Kosha in Yamanouchi Town and has built its reputation as a park destination. The resort runs four pair lifts and maintains one of Japan's largest snow park setups, with close to 50 features spread across multiple zones including self-responsibility areas. The terrain mix skews heavily toward beginners and intermediates, making it an accessible mountain for progression and park riding.<br><br>The 90% snowboarder split tells you everything about the vibe here — this is a boarder's mountain. Runs are relatively short and mellow, with limited steep terrain, so expect to spend more time in the park or lapping easier pitches than hunting for challenging descents. The 350m vertical and compact layout mean you'll cover the whole mountain quickly, which works fine for a focused park session but can feel limiting on a powder day.<br><br>X-JAM has recently aligned more closely with the adjacent Yomase Onsen area, sharing lift passes and marketing under the Mt. KOSHA banner. The base sits at 700m, so snow reliability can be variable in warmer seasons. There's no night skiing, and the area itself is quiet — if you're looking for après-ski energy, you'll want to stay elsewhere or head toward the busier Shiga Kogen resorts nearby.