five

1. Origins, structure, and basic meaning

• Structure: 五 represents five and uses the on reading ご and readings based on いつ.
• Basic usage: 五つ, read いつつ, counts five objects or items; 五月, read ごがつ, means May.

2. Common pitfalls and similar expressions

• The fifth and five days
  • 五日 is read いつか. 今月の五日 means the fifth of this month, while 五日が過ぎた means five days have passed.
  • The ご in the month name 五月 is not carried over unchanged into 五日.
• The same sound meaning someday
  • いつか in いつか会いたい means someday and does not specify a date.
  • Despite the same sound, the numerical 五日 differs from いつか referring to an unspecified time.