About Marine Day
Marine Day, or 海の日 (Umi no Hi), is a national holiday in Japan that celebrates the ocean and its importance to the country's culture and economy. Established in 1996, it aims to promote awareness of the ocean's significance and encourage people to appreciate and protect marine resources.
Marine Day is a public holiday in Japan. In 2025, it falls on Monday, July 21. In the local language, this holiday is known as "海の日". This holiday does not fall on the same date every year — its date varies annually.
This is a national holiday, observed throughout all of Japan. Most businesses, government offices, and schools are closed on this day.
Traditions & Customs
On Marine Day, many Japanese people participate in beach clean-up activities and various maritime events, such as boat races and fireworks displays. Families often enjoy barbecues and outdoor activities by the sea, taking advantage of the summer weather to connect with nature and celebrate the ocean.
Did You Know?
Marine Day is celebrated on the third Monday of July, and it marks the beginning of the summer vacation season for many students in Japan.
Holiday Details
| Holiday Name | Marine Day |
| Local Name | 海の日 |
| Date | Monday, July 21, 2025 |
| Country |  Japan |
| Type | Public |
| Scope | National — observed throughout the country |
| Fixed Date | No — date varies annually |
Holiday Greeting
"海の日おめでとうございます (Umi no Hi omedetou gozaimasu)"
Frequently Asked Questions
What activities are popular on Marine Day in Japan?
Popular activities include beach clean-ups, fireworks displays, and various water sports. Many families also enjoy picnics and barbecues by the ocean.
Is Marine Day a public holiday in Japan?
Yes, Marine Day is a public holiday in Japan, allowing people to take a day off to celebrate and appreciate the ocean.
How does Marine Day promote environmental awareness?
Marine Day encourages citizens to participate in activities that protect and preserve marine environments, such as beach clean-ups. It also raises awareness about the importance of sustainable practices to maintain healthy oceans.
When is Marine Day 2025 in Japan?
Marine Day 2025 in Japan falls on Monday, July 21, 2025.
Is Marine Day a public holiday in Japan?
Yes, Marine Day is a public holiday in Japan. It is observed nationwide.
Is Marine Day on the same date every year?
Marine Day does not have a fixed date and varies from year to year.