貝殻・貝がら・貝殼|かいがらkaigara[0]heiban (flat)

JLPT N1approx.Common
Which spelling to use
貝殻貝殻 is the most common written form and uses kanji only. For beginners, it is the recommended form when writing this word.
貝がら貝がら is a less common variant written with kanji and kana mixed. Beginners should generally choose 貝殻 instead.
貝殼貝殼 is a less common kanji-only variant using an outdated kanji. Learners should choose 貝殻 rather than this form.
Definitions
  1. nounseashell; shell
    トムは美うつくしい貝かいがらを浜辺はまべでひろった。↗
    Tom picked up some pretty shells on the beach.
Synonyms & antonyms
  • SynonymシェルNeutralLoanword meaning a shell, used mostly in names or computer terminology; for shells in everyday speech say 「貝殻」.
  • Synonym甲こうWrittenWritten style for tortoise shells and carapaces; seldom used alone, it appears mostly in compounds.
  • Synonym介殻かいかくWrittenWritten, zoological term for a seashell; in everyday speech say 「貝殻」.
  • Related甲こうWrittenWritten style for tortoise shells and carapaces; seldom used alone, it appears mostly in compounds.
  • Related甲羅こうらNeutralThe hard shell of turtles, crabs and the like; it is not used for the shells of clams, snails or other molluscs.
  • Related甲殻こうかくWrittenWritten, biology-leaning word for the shells of shrimp and crabs, as in 「甲殻類」.

Use 「貝殻」 for a shellfish's shell, as in 「貝殻を拾う」. For turtle or crab shells say 「甲羅」, for crustaceans 「甲殻」; 「介殻」 is zoological. 「シェル」 appears in names and computing, 「甲」 in compounds.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 貝類かいるいが持もつ石灰せっかい質しつの外そと骨格こっかく。
Kanji in this word

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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