Marunuma Kogen opens on Friday, 4 December 2026 for the 2026-2027 winter season, and plans to close on Wednesday, 5 May 2027. Last season it opened on 5 December.
From 4 to 18 December, the resort uses early-season lift ticket prices.
Most resorts near Tokyo announce their dates between September and November. We track every confirmed 2026-2027 date, and explain how season timing works, in one place: When Do Honshu Ski Resorts Open?
Source: Marunuma Kogen official website. Translated and summarised by Japow Guides.
