公開

1. Origins, structure, and basic meaning

• Structure: 公開 is read as こうかい and is a noun and する verb for opening material to the public or releasing a film or work.
• Basic usage: Public access appears in 一般に公開する, while a film release appears in 映画の公開.

2. Common pitfalls and similar expressions

• Open and release
  • Open to the public suits documents or facilities, while release suits presenting a film to audiences.
• Difference from 公表
  • 公表 focuses on officially announcing information or a decision; 公開 focuses on making something available to see or use.