Translation guide
An event where a school, business, or organization opens its doors to the public for visits and information.
An event where prospective students and parents can visit a school or university to learn about it.
An event where a company or organization invites the public to visit its facilities.
A direct loanword from English, commonly used for corporate or institutional open days.
来週、会社のオープンデーがあります。
There is a company open day next week.
The most common term for a university or college open day in Japan. Often abbreviated as OC.
来月、東京大学のオープンキャンパスに行く予定です。
I plan to go to the University of Tokyo's open day next month.
Literally 'school information session'. Used for open days at schools, especially private ones, where there is a formal presentation.
この学校の説明会は予約が必要です。
You need to reserve a spot for this school's open day.
Used for open days at elementary, junior high, or high schools, often involving class observations.
オープンスクールで授業を見学しました。
We observed classes during the open day.
Means 'open to the public'. Used for facilities or events that are normally closed, like factories or research institutes.
研究所の一般公開に参加しました。
I attended the research institute's open day.