ヤマトオサガニ LinksSentence search for ヤマトオサガニSentence search for 大和長蟹Sentence search for やまとおさがにEdit in JMdict Noun1. Japanese mud crab (Macrophthalmus japonicus)Usually written using kana aloneOther forms大和長蟹 【やまとおさがに】 Discussions Log in to talk about this word.