便所

1. Origins, structure, and basic meaning

• Structure: 便所 is read as べんじょ and is a noun for a toilet or privy and can sound more direct or old-fashioned than common polite alternatives.
• Basic usage: An outdoor privy appears in 便所が母屋の外にある, while a cabin toilet appears in 山小屋の便所.

2. Common pitfalls and similar expressions

• Register depends on context
  • It fits descriptions of older buildings or facilities, but a different expression is often preferred in polite modern guidance.
• Difference from トイレ and お手洗い
  • トイレ is the everyday term and お手洗い is more polite, while 便所 sounds more direct in referring to the place.