来週

1. Origins, structure, and basic meaning

• Structure: 来週 (らいしゅう) is a temporal noun and adverb for the week immediately following the current one.
• Basic usage: 来週の日曜日に山へ行く modifies the date of a family trip, while 期限は来週まで延びた marks the final week allowed for submission.

2. Common pitfalls and similar expressions

• Specific day and deadline range
  • 来週の日曜日 selects one day in the following week, whereas 来週まで marks a deadline range. The term is not fixed to exactly seven days from today.