whale

1. Origins, structure, and basic meaning

• Structure: 鯨 denotes a whale; its on-reading is げい, and its kun-reading is くじら.
• Basic usage: Standalone 鯨 refers to a whale or the animal generally, while 鯨類 refers collectively to cetaceans or whale species.

2. Common pitfalls and similar expressions

• 鯨 / 鯨類
  • 鯨: Read as くじら, this basic noun refers to a whale. Example: 絵本の鯨が大きな潮を吹いている。
  • 鯨類: Read as げいるい, this collective term refers to cetaceans or kinds of whales in research and museum contexts. Example: 博物館には鯨類の大きな骨格が展示されていました。