also: くさりどい
noun
rain chain; chain downspout
A chain hung from a roof gutter to guide rainwater downward, often with ornamental cups. Common in traditional Japanese architecture.
このお寺の軒下には、美しい鎖樋が下がっている。
A beautiful rain chain hangs from the eaves of this temple.
鎖樋は雨の日になると、水が鎖を伝って流れる様子が風情がある。
On rainy days, the rain chain has a charming appearance as water flows down the chain.
Compound of 鎖 (くさり, 'chain') and 樋 (とい/どい, 'gutter, pipe'). The reading どい is a voiced variant (rendaku) of とい.