開栓

1. Origins, structure, and basic meaning

• Structure: 開栓 (かいせん) is a noun that also forms a する verb for uncapping or opening a bottle or stoppered container.
• Basic usage: It appears when opening a bottle or giving storage instructions for after it has been opened.
  • 店員が客の前で瓶を開栓した。 — The server opened the bottle in front of the guest.
  • この飲料は開栓後に冷蔵してください。 — Refrigerate this drink after opening.

2. Common pitfalls and similar expressions

• Uncapping and opening packaging
  • 開栓 focuses on removing a cap or stopper from a container, while 開封 more broadly means opening a sealed envelope or package.