Itoigawa Seaside Valley vs Koshi Kogen Ski Resort

Itoigawa Seaside Valley (Niigata Prefecture) and Koshi Kogen Ski Resort (Niigata Prefecture) head-to-head: stats, terrain, and 2026-27 pass coverage.

StatItoigawa Seaside ValleyKoshi Kogen Ski Resort
Vertical drop1,608 ft (490 m)427 ft (130 m)
Summit elevation2,408 ft1,434 ft
Base elevation801 ft1,007 ft
Lifts51
Runs154
Beginner terrain40%50%
Intermediate terrain33%50%
Expert terrain27%0%
Night skiing--

Itoigawa Seaside Valley has the bigger vertical (1,608 ft vs 427 ft); Itoigawa Seaside Valley has more runs (15 vs 4); Itoigawa Seaside Valley skews more expert (27% expert terrain).

Which pass covers them?

ResortPass coverage (2026-27)
Itoigawa Seaside ValleyNot on a major pass; lift tickets only
Koshi Kogen Ski ResortNot on a major pass; lift tickets only

No single pass covers both, so skiing both means separate passes or lift tickets. Check your full resort list in the pass finder →

Stay near Itoigawa Seaside Valley

Lodging near the base fills up first during peak weeks. Search stays near Itoigawa Seaside Valley

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More detail: Itoigawa Seaside Valley stats · Koshi Kogen Ski Resort stats