water spider; diving bell spider
Refers to the species Argyroneta aquatica, the only spider that lives almost entirely underwater.
The water spider is a rare spider that builds its nest underwater.
ninja water-walking shoes
Historical term for buoyant footwear used by ninja to walk on water; not a modern item.
It is said that ninja moved across water using buoyant gear called mizugumo.
Katakana spelling is common for this word, and It is usually written in kana.
Mixed kanji-katakana spelling; also used.
Kanji spelling; less common than kana, but still encountered.
Compound of 水 (mizu, 'water') and 蜘蛛 (kumo, 'spider'). The ninja tool sense is a metaphorical extension based on the idea of walking on water like a spider.