Japanese
Noun
合羽 (hiragana かっぱ, katakana カッパ, romaji kappa)
- a raincoat, especially a poncho or other sleeveless style
References
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1 2 1988, 国語大辞典（新装版） (Kokugo Dai Jiten, Revised Edition) (in Japanese), Tōkyō: Shogakukan
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1 2 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, ISBN 4-385-13905-9