noun
traditional Japanese bath heated by a metal pipe
A bath where water is heated by a metal pipe (often a gun barrel) passing through the firebox; historically used in rural areas.
昔の農家では、鉄砲風呂がよく使われていた。
In old farmhouses, the teppō-buro was commonly used.
A different traditional bath heated directly from below, without a metal pipe.
From 鉄砲 (teppō, 'gun') + 風呂 (furo, 'bath'), referring to the metal pipe (originally a gun barrel) used to heat the water.