How to say "overseas" in Japanese

• 海外かいがいJLPT N3approx.Common
  no-adjectiveThe default word for 'overseas' in nearly any sense: foreign countries, travel abroad, goods or markets from outside Japan. It works in everyday conversation and writing alike.
  君きみはどれくらいよく海外かいがいに行いきますか。↗

  How often do you go abroad?
• 在外ざいがいCommon
  no-adjectiveCovers 'overseas' only in the sense of being stationed or based abroad, typically of people or organizations belonging to a country. Poor choice for overseas travel in general; mainly seen in formal, official contexts.

Use 海外 as the everyday word for foreign countries and anything overseas; 在外 is a formal term for persons or organizations being located abroad, not for overseas travel in general.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 海外かいがいforeign
• 在外ざいがいoverseas
• 外国部隊がいこくぶたいoverseas (military forces)