noun
expedition style; siege style
A mountaineering strategy where climbers establish a series of camps and ferry supplies up the mountain, as opposed to alpine style. Used in technical climbing contexts.
エベレスト登頂では、多くの隊が極地法を採用する。
Many expeditions on Everest use the siege style.
極地法は、アルパインスタイルよりも時間と物資を要する。
Expedition style requires more time and supplies than alpine style.
Compound of 極地 (polar region, extreme place) and 法 (method). The term likely originated from the methodical, large-scale expedition tactics used in polar exploration, later applied to high-altitude mountaineering.