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Marine Day in Japan
Marine Day gives thanks to the ocean for Japan's prosperity. See the exact date for Japan above.
Next Marine DayMonday, July 20, 2026
Most recentMonday, July 21, 2025
Public holiday?Yes
History
Marine Day gives thanks to the ocean for Japan's prosperity.
How it's celebrated
It is a public holiday in Japan — government offices, schools, and most businesses close for the day.
See the full list of public holidays in Japan for 2026, browse an interactive calendar, or check holidays for any country with the holidays tool.
Frequently asked questions
Is Marine Day a public holiday in Japan?
Yes — Marine Day is a public holiday in Japan.
What does Marine Day commemorate?
Marine Day gives thanks to the ocean for Japan's prosperity.