Translation guide
The English phrase "be open" covers a wide range of meanings, from physical states like a door being ajar to abstract attitudes like being receptive to ideas. This guide breaks down the most common and useful Japanese equivalents for English-speaking learners, organized by intended meaning.
Describing something that is not closed, such as a door, window, container, or a business that is operating.
The most common and general way to say something is physically open. It uses the intransitive verb 開く (あく).
The door is open.
The window is open.
Specifically for a shop or business being open for customers.
Is that store still open?
A sign or state indicating a business is open. Often seen on doors.
The sign says "Open".
Describing a person who is willing to consider new ideas, experiences, or opinions.
Literally "heart is wide," meaning open-minded, generous, and accepting.
He is an open-minded person.
Literally "without prejudice," used to describe someone who is open and unbiased.
She is open-minded.
Loanword from English, often used for "open" personality or atmosphere. Casual.
He has a very open personality.
Expressing willingness to accept or consider something specific.
Pattern meaning "to accept ~." Use with words like 提案 (suggestion) or 意見 (opinion).
To be open to new ideas.
Pattern meaning "to be positive toward ~." Conveys openness and a proactive attitude.
I'm open to changes.
Indicating that a matter is not settled and can still be discussed or changed.
Describing an area that is wide, clear, or not enclosed.
Doing something in a public or transparent manner, not secretly.
The English phrase "be open" is highly context-dependent. A direct translation like 開いている only works for physical openness. For abstract meanings, you must choose the appropriate Japanese expression based on the intended nuance.
Both mean "to open," but あく is intransitive (something opens by itself) and ひらく can be transitive or intransitive, often implying a deliberate spreading or unfolding (e.g., opening a book, flower blooming). For "be open" as a state, 開いている (あいている) is standard.
The door is open.
She is open to new ideas.
The store is open until 9.