single-toothed geta; tall geta with one tooth
Refers to a specific type of traditional Japanese wooden clog with a single tall support, historically used by mountain ascetics or in certain performances.
山伏は一本歯の下駄を履いて修行した。
The mountain ascetic trained while wearing single-toothed geta.
Single-toothed geta are difficult to balance on.
Compound of 一本 (ippon, 'one long slender object') and 歯 (ha, 'tooth'), referring to the single 'tooth' of the geta. The reading ば is a rendaku form of は.