渡航

1. Origins, structure, and basic meaning

• Structure: 渡航 is a noun read とこう for traveling across the sea or a national border and is also used as 渡航する.
• Basic usage: It relatively formally describes the travel itself and related arrangements, such as checking documents before departure or postponing travel to an island.
  • 渡航の前に必要な書類を一覧で確認しました。 concerns checking required documents before travel; 悪天候のため、島への渡航を翌日に延期しました。 concerns postponing travel to an island until the next day because of bad weather.

2. Common pitfalls and similar expressions

• 渡航の前に
  • の links the travel to the time before it, while に marks when the documents were checked.
• 島への渡航
  • へ marks the destination and combines with の to modify the following noun 渡航.
• 渡航 and 旅行
  • 旅行(りょこう) broadly denotes a trip, while 渡航 focuses on travel across sea or borders and its related procedures.