貝(かい) かい noun shellfish, shell animal-general 1. shellfish Aquatic animals with shells, such as clams and oysters. 貝(かい)を食(た)べる。🔊 To eat shellfish. 貝(かい)が口(くち)を閉(と)じている。🔊 The shellfish has its shell closed. アサリは二枚貝(にまいがい)だ。🔊 Clams are bivalves. 新鮮(しんせん)な貝(かい)を買(か)った。🔊 I bought fresh shellfish. 貝(かい)を潮干狩(しおひが)りで採(と)る。🔊 To gather shellfish at low tide. 2. shell The hard outer covering of shellfish. 浜辺(はまべ)で貝(かい)を拾(ひろ)った。🔊 I picked up shells at the beach. 貝殻(かいがら)を集(あつ)める。🔊 To collect seashells. 美(うつく)しい貝(かい)を見(み)つけた。🔊 I found a beautiful shell. 貝(かい)で飾(かざ)りを作(つく)る。🔊 To make decorations with shells. 貝(かい)を磨(みが)く。🔊 To polish a shell. 貝(かい) refers to both shellfish (the animal) and their shells.Types of shellfish二枚貝(にまいがい): bivalve (clams, mussels)巻(ま)き貝(がい): gastropod, snailアサリ: short-neck clamハマグリ: hard clam牡蠣(かき): oysterホタテ: scallopCommon expressions貝(かい)を拾(ひろ)う: to pick up shells貝(かい)を採(と)る: to gather shellfish潮干狩(しおひが)り: shellfish gathering at low tideCompounds貝殻(かいがら): seashell貝柱(かいばしら): adductor muscle (scallop meat)貝塚(かいづか): shell mound (archaeological)Cultural note潮干狩(しおひが)り is a popular spring activity in Japan. core Added 2026.1.9 21:21 · Revised 2026.9.2 13:01 02000/02145_kai