The climbing season for Mt. Fuji will finally begin on July 1, 2026. Amidst a continuing boom in Mt. Fuji climbing, particularly among middle-aged and older individuals and beginners, "hypoxic training," which enhances cardiopulmonary function and endurance in a short time, is gaining popularity as a new preparation method and altitude sickness countermeasure for climbing Mt. Fuji. At "High Alti," which optimizes high-altitude training performed by professional athletes for the general public, approximately 93% of members responded "satisfied" in a member survey, with many reporting "reduced breathlessness on ascents" and "no altitude sickness symptoms" on Mt. Fuji and other high mountains. International research also indicates that exercising in a low-oxygen environment can improve cardiopulmonary function in a short time while minimizing physical strain. It is gaining attention among mountaineering enthusiasts and mountain guides as a "safe, efficient, and effective" preparation method for climbing that can be undertaken by anyone, regardless of age or gender. Mt. Fuji Altitude Sickness Prevention Starts with "Air". ■ Fatigue, Headaches, and Retirements During Climbing... The Cause is Insufficient "Low-Oxygen" Countermeasures The climbing season for Mt. Fuji will finally begin on Wednesday, July 1, 2026. Did you know that out of the over 200,000 people who challenge Japan's highest peak, Mt. Fuji, each year, about 1 in 10 climbers give up before reaching the summit?*1 The aging of climbers, the boom in beginner mountaineering, and rapid weather changes due to global warming. Against this backdrop, "balancing physical strength and safety" is becoming increasingly important for climbing Mt. Fuji. This is where the new habit of "changing the air before climbing," hypoxic training, is drawing attention. "High Alti," Japan's first*2 specialized high-altitude training studio, responds to concerns such as: "I'm climbing for the first time and feel anxious." "I'm worried