世帯

1. Origins, structure, and basic meaning

• Structure: 世帯 is read as せたい and is a noun for a household counted as one residential and living unit.
• Basic usage: The number living in a building appears in 十世帯が暮らす, while per-household distribution appears in 世帯ごとに配る.

2. Common pitfalls and similar expressions

• Counting units of residence
  • It counts groups sharing a living arrangement rather than individual people, so one building may contain several households.
• Difference from 家族
  • 家族 denotes relationships among family members, whereas 世帯 focuses on a co-residential or administrative household unit.