Seki Onsen is a tiny, family-run area on the north-eastern side of the Myoko range, with only four runs over just 30 hectares and a vertical of 310 metres, from 900 metres to 1,210 metres. Despite the size, the snow is the draw. The split is 20% beginner, 50% intermediate and 30% advanced, and the lift system of doubles, triples and quads simply repeats those short, steep pitches. Marked pistes matter less than ungroomed snow, so think of it as a place to ski powder rather than to tick off runs.

The Silver Fan Course is the name to know, an advanced run left ungroomed to hold the steepest slopes and deepest snow on the mountain. Around it are tree runs and sidecountry lines, with moguls forming in spring. Facilities are minimal, with a single on-mountain restaurant and a low-key atmosphere. Seki Onsen suits strong intermediates through to advanced skiers who want a powder-first day without the crowds of larger Myoko areas. Beginners will find it limiting, and anyone heading beyond the marked terrain should carry avalanche gear and go with a guide. Check lift status before travelling, as the season runs long into spring.

The 2025-2026 season runs from 5 December 2025 through 29 March 2026, though operations frequently extend into early May when snowpack permits. Lifts operate 9:00 AM to 4:30 PM daily. Seki regularly outlasts all other Myoko resorts due to its exceptional snow retention and north-facing aspect. The area celebrated 100 years of skiing operations in 2017.

Annual snowfall averages 14 to 16 metres, among the highest totals in Japan. The resort's position at 1,000 metres elevation where cold Siberian air meets moisture from the Sea of Japan creates ideal powder conditions. Minimal snowmaking exists as natural accumulation proves sufficient throughout winter. Base depths regularly exceed two metres by mid-season, with the upper single chair sometimes buried during storm cycles.

January and February deliver peak powder conditions with frequent storm cycles refreshing terrain every few days. December offers early-season depth whilst March provides longer daylight and spring corn conditions. Late-season skiing continues through April when mogul fields develop on ungroomed slopes. The area's compact size means fresh lines disappear quickly after storms, making timing critical for untracked snow.

Mid-March onwards brings increased activity as other resorts close, with banked slalom competitions and a fireworks festival marking the late season. No night skiing operates. The resort publishes minimal advance scheduling, reflecting its owner-operated flexibility. Powder board test rides and terrain park features appear intermittently depending on conditions and staffing.