壱

1. Origins, structure, and basic meaning

• Structure: 壱(いち) is a formal written form of the numeral one.
• Basic usage: It appears in contexts using formal numerals, such as receipt amounts and banknotes.

2. Common pitfalls and similar expressions

• Value and written form
  • 一 and 壱 both represent one, but use different written forms.
• Reading an amount
  • 壱万円(いちまんえん) means ten thousand yen.