Marine Day in Japan: Everything You Need to Know

What is Marine Day?

Marine Day, known in Japanese as Umi no Hi, is a national holiday in Japan held on the third Monday of July. The holiday was established to honor the ocean's bounty and to reflect on the vital role the sea plays in the country's geography, economy, and culture. Because Japan is an island nation, the sea is considered a fundamental source of life and prosperity.

Since 2000, the holiday has been observed on the third Monday of July as part of the Happy Monday System. This system was implemented to create three-day weekends, encouraging domestic travel and leisure activities. If the third Monday falls on a day that coincides with another holiday, a substitute holiday (furikae kyūjitsu) is observed.

How is it Celebrated?

While Marine Day is not a holiday characterized by specific religious rituals, it is widely celebrated through various seasonal activities. Because it occurs in mid-July, the weather is typically hot and humid, making it a popular time for outdoor excursions.

• Coastal Activities: Many families and tourists head to beaches across Japan for swimming, surfing, and seaside picnics. Popular coastal destinations in regions like Chiba, Kanagawa, or Okinawa see increased visitor numbers.

• Marine Events: Aquariums across the country, such as the Osaka Aquarium Kaiyukan, often host special exhibits, educational programs, or seasonal events to celebrate the day.

• Local Festivals: Some coastal towns hold local festivals (matsuri) that include maritime parades, boat races, or ceremonies to pray for safe voyages and abundant catches.

Practical Information for Residents and Visitors

If you are planning to travel or conduct business during Marine Day, keep the following practicalities in mind:

Business and Services: Most government offices, banks, and schools will be closed. While many retail stores, shopping malls, and restaurants remain open, some smaller local businesses may close. It is wise to check the specific holiday hours of any service you intend to use.

Transportation: Expect heavy crowds on expressways and major train lines, especially those heading toward coastal areas or popular tourist hubs. If you plan to travel via Shinkansen or long-distance highway buses, it is highly recommended to book your seats well in advance.

Weather and Safety: July is characterized by intense summer heat and high humidity. Additionally, it is a season when typhoon activity can occur. Always check the latest weather forecasts from the Japan Meteorological Agency before heading to the coast.

Good to know

• Long Weekends: The holiday creates a three-day weekend, and many people take additional time off to extend their break.

• Pricing: Some hotels and transportation services may implement higher rates during this holiday period.

• Crowds: Popular beaches and seaside parks will be significantly more crowded than usual.

Official information

• Prime Minister's Office of Japan
• Ministry of Foreign Affairs of Japan
• Japan National Tourism Organization (JNTO)

Rules and fees can change. Please confirm the latest details with the official sources above.