Seki Onsen operates across 310 metres of vertical drop from a 900-metre base to a 1,210-metre summit. The area records 14 to 16 metres of annual snowfall and comprises four official runs serviced by two chairlifts, spanning approximately 30 hectares. The ski area sits 30 kilometres from the Sea of Japan on the northeastern slopes of Mount Myoko in Niigata Prefecture, capturing Siberian storm systems that deliver exceptional powder depth. The resort operates from early December through early May, often extending its season well beyond neighbouring areas.

Terrain splits 30 per cent beginner, 40 per cent intermediate and 30 per cent advanced across short but steep runs. The Silver Fan Course remains ungroomed throughout the season, offering the steepest gradients and deepest powder within the Myoko mountain range. Most slopes receive minimal grooming, preserving natural snow conditions for powder skiing. The area allows unrestricted off-piste access through marked sidecountry zones and tree skiing terrain, unusual among Japanese resorts.

Seki Onsen has operated continuously since 1917, making it one of Japan's oldest ski areas. The Inoue family has owned and managed the resort for nearly 50 years, maintaining a low-key operation with no ski patrol presence. A single on-mountain restaurant serves homemade meals, whilst the base village contains minimal facilities. The area attracts international powder skiers seeking untracked terrain and an authentic mountain experience free from modern resort infrastructure.

The resort functions independently with no pass affiliations to neighbouring Myoko resorts. Day tickets cost ¥4,500 for adults, reflecting the minimal lift infrastructure and facilities. Seki suits advanced skiers and snowboarders comfortable navigating steep, ungroomed terrain without patrol oversight. The tiny scale means fresh snow tracks out quickly on popular powder days, typically within hours of opening.