Discovering Marine Day July 2025 | Tokyo Things To Do

Credits: Web-Japan org. (Soft lantern lights glowing on Odaiba Beach during Marine Day)

Have you heard of Marine Day in Japan? It’s a special public holiday that takes place every third Monday of July. In 2025, Marine Day will be on July 21. This is a day to celebrate the ocean and appreciate everything the sea gives us.

 

What is Marine Day?

Marine Day is called "Umi no Hi" in Japanese. It’s a time for people to say thank you to the ocean. The sea is very important to Japan — it provides food, helps with travel, and connects the country to the world. This day reminds everyone how lucky Japan is to be surrounded by water.

What Do People Do on Marine Day?

Since it’s a summer holiday, many families go outside and enjoy the day. People visit:

  • Beaches

  • Aquariums

  • Parks near the sea

  • Boat rides and cruises

Some areas have festivals, lantern events, or even fireworks at night. It’s a great time to relax, have fun, and enjoy the beauty of nature.

How You Can Celebrate

Even if you’re visiting Japan as a tourist, you can join in the fun! Here are a few simple ways to enjoy Marine Day:

  • Visit a beach or walk by the sea

  • Go to an aquarium to learn about sea life

  • Take a cruise or boat ride

  • Try seafood dishes at local restaurants

  • Join a tours by locals japan to see how people in Japan enjoy this holiday

Marine Day is a peaceful, happy celebration. It’s perfect for families, couples, or solo travelers who want to experience Japanese culture in a simple and relaxing way.

 

Whether you’re in the city or near the coast, Marine Day is a wonderful time to slow down and connect with nature. It’s not a big festival, but it’s full of meaning — and a great way to enjoy the sea, summer, and sunshine, so make sure to include this on your Tokyo things to do list!

 

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