考案

1. Origins, structure, and basic meaning

• Structure: 考案 is a noun and irregular transitive verb read こうあん, meaning to devise a new method, tool, or activity.
• Basic usage: The devised object takes を, as in 遊びを考案する and 収納法を考案する.
  • 子どもたちが新しい遊びを考案した。 describes children devising a new game; 狭い棚を活用する収納法を考案した。 describes devising a storage method that uses a narrow shelf.

2. Common pitfalls and similar expressions

• 遊びを考案する
  • を marks the newly devised activity.
• 棚を活用する収納法
  • The relative clause explains that use of the narrow shelf is central to the storage method.
• 考案 and 検討
  • 検討 examines an existing proposal, while 考案 creates a new idea or method.