上限

1. Origins, structure, and basic meaning

• Structure: 上限 (じょうげん) is a noun for an upper limit or cap that must not be exceeded.
• Basic usage: 上限は二十人 states a maximum number, while 上限を設ける means to set a cap.
  • 参加人数の上限は二十人です。 — The maximum number of participants is twenty.
  • 修理費にはあらかじめ上限を設けた。 — We set a cap on repair costs in advance.

2. Common pitfalls and similar expressions

• Upper and lower limits
  • 上限 is the maximum allowed boundary, while 下限 is the minimum boundary. 最大値 can instead mean the greatest actual value in a set.