七つ

1. Origins, structure, and basic meaning

• Structure: 七つ is read as ななつ and is a native Japanese counting expression meaning seven items or units.
• Basic usage: Independent counting appears in 箱が七つ, while noun modification appears in 七つの班.

2. Common pitfalls and similar expressions

• Reading of 七
  • The character 七 has readings such as なな and しち, but this native counting form is read ななつ.
• General-purpose counting
  • It counts many kinds of objects or items without a specific counter, although categories such as people commonly use dedicated counters.