四

1. Origins, structure, and basic meaning

• Structure: The numeral 四, read よん here, denotes the number four in counting and labels.
• Basic usage: A calculation can end with 四になる, and the numeral may be written on a card that determines order.

2. Common pitfalls and similar expressions

• The number four and its reading
  • In counted quantities and number labels, 四 is read よん; fixed expressions may have their own established reading.