初旬

1. Origins, structure, and basic meaning

• Structure: 初旬 is read as しょじゅん and is a time noun for the early part of a month.
• Basic usage: Opening early next month appears in 来月初旬に店が開く, while sending something in early June appears in 六月初旬に発送する.

2. Common pitfalls and similar expressions

• Month expression and event time
  • It follows a month expression and takes に for the event time.
• Difference from 月初
  • 初旬 denotes an early-month period rather than the immediate start of the month.