About YamaCalc

YamaCalc is a set of calculators for hiking and camping in Japan: course time the way Japanese maps count it, water, temperature by altitude, pack weight and fuel. The English guides cover what overseas visitors ask most: Mt. Fuji, the Japanese Alps and their hut system, pilgrimage trails, transport, costs and local rules.

The formulas follow the standard planning rules used in Japanese hiking (the course-time method, the atmospheric lapse rate, hydration guidelines) and manufacturers' published figures. Mountain conditions change with weather, season and how you feel on the day, so treat results as a starting point and make the final call on the ground with safety first.

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Corrections and suggestions are welcome through the contact form (coming soon).