昨秋

1. Origins, structure, and basic meaning

• Structure: 昨秋 is read as さくしゅう and is a time expression meaning the autumn or fall of the previous year.
• Basic usage: Something planted last fall appears in 昨秋に植えた, while a meeting from that season appears in 昨秋の読書会.

2. Common pitfalls and similar expressions

• A formal seasonal expression
  • It expresses last autumn in one compact word and suits articles, letters, and formal writing.
• Difference from 去年の秋
  • The meaning is the same, but the comparison phrase is more common in conversation, while this word is concise and literary.