慣習

1. Origins, structure, and basic meaning

• Structure: 慣習(かんしゅう) refers to a custom established through repetition within a society or region.
• Basic usage: It appears when asking about an old local custom or reconsidering whether it suits the times.

2. Common pitfalls and similar expressions

• Focus compared with 習慣
  • 習慣 broadly includes a person's repeated daily behavior, while 慣習 focuses on practices continued within a group.
  • 早起きの習慣 is an individual's habit of getting up early; 地域の慣習 is a local community's custom.