Translation guide
The first day an event, business, or season begins. Japanese expressions vary by context: store openings, sports seasons, ceremonies, or the start of a new period.
The first day a new shop, restaurant, or business opens to the public.
Standard term for the opening day of a store or business. Used in announcements and signage.
The new cafe's opening day is next Saturday.
Casual, often used in marketing or conversation. Borrowed from English 'open'.
There's a special sale on opening day.
Formal term for the opening day of a business or practice (e.g., clinic, law office).
The clinic's opening day hasn't been decided yet.
The first day of a festival, exhibition, conference, or formal event.
General term for the first day of any event, performance, or exhibition.
Many directors come on the opening day of the film festival.
Emphasizes the first day of a held event. Common in formal schedules.
Literary or dramatic term for 'curtain-raiser', used figuratively for the start of an event.
The first game or day of a sports season.
Standard term for the opening game or match of a season.
The opening day game of the pro baseball season was sold out.
Refers specifically to the calendar day the season starts.
Common phrase for 'season opener', often used in news.
Only one week until opening day of the season.
The start of a new school year, fiscal year, or seasonal activity.
The English phrase 'opening day' does not have a single direct equivalent. Always choose the term that matches the context (store, event, sports, etc.). Using 開店日 for a sports game would sound unnatural.
初日 is the general 'first day' and can be used for almost anything. 開幕日 is specifically for seasons or series that 'raise the curtain' (開幕), like sports or theater runs.
On the opening day of the exhibition, only相关人员 can enter.
祭りの幕開けを告げる花火が上がった。
Fireworks announced the opening day of the festival.
The J-League's opening day has been announced.
On the opening day of sweetfish season, many anglers gather.