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Japan Public Holiday

Marine Day

海の日

Upcoming in 30 days 2026-07-20

Quick Facts

Date 2026-07-20
Day of Week Monday
Holiday Type Public Holiday
Mandatory Workday No

Historical Background & Origins

Marine Day (海の日, Umi no Hi) is a Japanese national holiday established in 1996 to honor the ocean's bounty and express gratitude for its blessings. The holiday's origins trace back to 1876 when Emperor Meiji traveled aboard the steamship Meiji Maru, safely returning to Yokohama after a voyage to Hokkaido. Initially observed on July 20, it was moved to the third Monday of July after the Happy Monday System reform in 2003, creating a three-day weekend. The day recognizes Japan's deep maritime heritage as an island nation, highlighting the ocean's role in transportation, food, culture, and climate regulation. It also promotes environmental awareness and marine conservation efforts.

Customs, Traditions & Celebrations

Celebrations often involve visits to coastal areas, beaches, and aquariums, where families enjoy activities like swimming, snorkeling, and seaside barbecues. Many communities host fireworks displays, sailing events, and beach cleanup drives. Aquariums and maritime museums offer special exhibitions and discounted admission. Traditional foods enjoyed include fresh seafood, sushi, and local fish dishes. A common greeting is 'Umi no Hi omedetou' (Happy Marine Day), though informal wishes like 'Tanoshii umi no hi o' (Have a fun Marine Day) are also used. Schools and organizations may hold educational programs about marine ecosystems, and some companies give employees the day off to appreciate the sea.