Marine Day and Obon in Japan: A Guide to Japanese Summer Holidays

Marine Day and Obon in Japan are two important parts of the Japanese summer, but they are very different.

Marine Day is an official national holiday held on the third Monday of July. Obon is a traditional period for remembering ancestors and spending time with family, usually observed around the middle of August.

For international residents, understanding the difference is useful when planning work, travel, shopping, and daily life during the summer.

In 2026, Marine Day falls on July 20. The main Obon period is generally expected around August 13 to 16, although Obon dates and customs can vary by region.

This guide explains the meaning of Marine Day and Obon in Japan, how people observe them, and what foreign residents should know about transport, business hours, festivals, and summer etiquette.

What Is Marine Day in Japan?

Marine Day, known as Umi no Hi in Japanese, is an official national holiday.

It is observed on the third Monday of July. In 2026, Marine Day is July 20.

The purpose of the holiday is to express gratitude for the benefits provided by the sea and to wish for the prosperity of Japan as a maritime nation.

Japan is surrounded by the sea, and the ocean has played an important role in the country’s food, transportation, trade, culture, and history.

Marine Day provides an opportunity to think about this relationship and to appreciate the importance of protecting the marine environment.

Why Does Japan Celebrate Marine Day?

Marine Day developed from an earlier commemorative day known as Marine Memorial Day.

The modern national holiday was first introduced in the 1990s. It was originally celebrated on July 20, but it was later moved to the third Monday of July.

Moving the holiday to Monday usually creates a three-day weekend for people who do not work on Saturdays and Sundays.

Marine Day is unusual because it focuses specifically on appreciation for the sea and Japan’s relationship with the ocean.

Although there is no single activity that everyone must follow, the holiday encourages people to think about marine life, coastal communities, shipping, fisheries, environmental protection, and the role of the sea in Japanese society.

How Do People Spend Marine Day?

Many people treat Marine Day as a summer day off.

Depending on the weather and location, activities may include:

• Visiting a beach
• Going to an aquarium
• Taking a boat trip
• Visiting a coastal park
• Fishing
• Participating in a marine-related event
• Learning about ocean conservation
• Spending time with family
• Taking a short summer trip

Some museums, ports, aquariums, and coastal communities organize special programs around Marine Day. Activities vary each year, so visitors should check official event information before travelling.

Marine Day falls during Japan’s hot and humid season. Anyone spending time outdoors should prepare for strong sunlight and high temperatures.

Are Shops and Offices Closed on Marine Day?

Because Marine Day is a national holiday, government offices and many banks are generally closed.

Some private businesses and medical clinics may also close or operate on reduced hours.

However, many supermarkets, convenience stores, restaurants, shopping centers, and tourist attractions remain open. Their hours may differ from normal weekday hours.

Public transportation continues to operate, but trains and buses may use a weekend or national holiday timetable.

Before visiting a bank, clinic, public office, restaurant, or attraction, check its official opening hours.

What Is Obon in Japan?

Obon is a traditional Japanese period for honoring ancestors.

It is commonly observed from August 13 to August 16, although the dates vary between regions and communities. Some areas observe Obon in July, while others follow a different local or lunar-calendar schedule.

According to traditional beliefs, the spirits of deceased family members return to visit their families during Obon.

Families may welcome the spirits, make offerings, visit graves, clean family memorials, and spend time together.

Obon has connections with Buddhist traditions, but the ways in which it is observed differ greatly between households. Not every person or family follows the same religious practices.

Is Obon a National Holiday?

Obon is not an official national holiday under Japan’s national holiday system.

This is an important difference between Marine Day and Obon in Japan.

Marine Day is a legally established public holiday. Obon is a traditional summer observance during which many employers choose to give employees time off.

As a result, banks, government offices, supermarkets, and public services do not automatically close simply because it is Obon.

However, many companies, factories, clinics, restaurants, and smaller businesses may close for several days during the Obon period.

Residents should check each organization separately rather than assuming that everything will be open or closed.

Common Obon Traditions

Obon traditions vary by region, religion, and family.

Common practices may include:

• Returning to the family hometown
• Visiting and cleaning family graves
• Placing flowers or offerings at a grave
• Preparing food for ancestors
• Lighting lanterns or small ceremonial fires
• Gathering with relatives
• Attending a local Bon Odori dance
• Visiting a temple
• Remembering deceased family members

Some families light a welcoming fire, called mukaebi, at the beginning of Obon and a farewell fire, called okuribi, at the end.

These customs are not followed in exactly the same way throughout Japan. International residents should avoid assuming that every Japanese family observes Obon identically.

What Is Bon Odori?

Bon Odori is a traditional style of community dancing associated with the Obon season.

Participants usually dance in a circle around a raised platform while traditional or regional music plays. Many people wear yukata, a light summer kimono, although ordinary summer clothing is also often acceptable.

The dances may appear complicated at first, but they commonly use repeated movements. Visitors can often watch other participants and follow the same pattern.

Bon Odori events may also include:

• Food stalls
• Traditional music
• Children’s activities
• Local community performances
• Festival decorations
• Summer games

The atmosphere is usually welcoming, but visitors should follow the instructions of event organizers and avoid blocking dancers, entrances, or emergency routes.

Can Foreign Residents Join Obon Events?

International residents can generally attend public Bon Odori festivals and community summer events.

You do not need to be Japanese or Buddhist to respectfully observe or participate in a public dance event.

Useful etiquette includes:

• Follow the direction of the dance
• Watch others before joining
• Avoid pushing into a crowded circle
• Keep noise at a reasonable level
• Ask permission before taking close photographs
• Do not photograph private religious ceremonies without permission
• Dispose of rubbish correctly
• Respect local residents and event volunteers
• Do not enter restricted areas

Private family memorial activities are different from public festivals. Residents should not invite themselves to a family ceremony unless they have been specifically invited.

Why Is Obon a Busy Travel Period?

During Obon, many people travel from major cities to their hometowns to visit relatives and family graves.

As a result, mid-August is one of Japan’s busiest domestic travel periods.

Shinkansen trains, domestic flights, highway buses, and expressways may become crowded. Hotels and rental cars can also be more difficult or expensive to reserve.

Residents planning to travel during Obon should:

• Make reservations early
• Reserve Shinkansen seats when possible
• Check traffic and transport information
• Allow extra travel time
• Confirm hotel cancellation conditions
• Avoid relying on last-minute bookings
• Check whether the return journey will also be crowded

People who do not need to travel during the busiest dates may find it easier to choose another period.

Shopping and Services During Obon

Large supermarkets and convenience stores commonly remain open during Obon, but opening hours can change.

Smaller restaurants, independent shops, clinics, repair businesses, and professional offices may close for several days.

Before Obon begins, residents may wish to confirm:

• Medical clinic schedules
• Pharmacy opening hours
• Rubbish collection dates
• Bank transfer deadlines
• Parcel delivery arrangements
• Restaurant reservations
• Workplace holidays
• School or university schedules
• Local government office hours

Do not wait until the final day before Obon to complete an urgent administrative or medical procedure.

Residents of Tokyo Garden House have access to nearby supermarkets and convenience stores, including a 24-hour Seiyu supermarket, which can be helpful when some smaller businesses are closed.

Parcel Delivery During the Summer Holiday Period

Parcel delivery services generally continue operating during national holidays and Obon, but high parcel volumes, traffic, weather, and business closures may affect delivery times.

If you are travelling, check parcel tracking before leaving home.

Residents should also:

• Check the mailbox for missed delivery notices
• Request redelivery promptly
• Avoid ordering refrigerated food when nobody will be home
• Confirm whether the sender is closed during Obon
• Check storage deadlines for undelivered parcels
• Arrange delivery dates when someone can receive the package

A parcel may be returned to the sender if it is not received within the delivery company’s storage period.

Summer Weather and Heat Safety

Marine Day and Obon both occur during Japan’s hot and humid summer.

Temperatures can be high even in the morning or evening. Outdoor festivals, beaches, parks, and sightseeing areas may provide limited shade.

When spending time outside:

• Carry water
• Use sunscreen
• Wear a hat
• Choose light and breathable clothing
• Take regular breaks
• Avoid excessive alcohol in hot weather
• Use air-conditioned rest areas
• Pay attention to heat warnings
• Do not ignore dizziness, nausea, or unusual tiredness

People who are not accustomed to Japan’s summer climate should avoid planning too many outdoor activities in one day.

Enjoying a Quieter Summer Near Tokyo Garden House

Residents do not always need to travel far to enjoy summer in Tokyo.

Tokyo Garden House is located in a quiet residential area near green spaces such as Zenpukuji Park. The park is a pleasant place for a morning or evening walk, although residents should avoid the hottest part of the day.

The surrounding neighborhood also provides access to:

• Supermarkets
• Convenience stores
• Japanese restaurants
• Local parks
• Everyday shopping
• Public transportation

This makes it possible to enjoy a quieter summer routine while still travelling to central Tokyo or other destinations when desired.

Experience Japanese Summer Culture

Marine Day and Obon in Japan provide international residents with an opportunity to understand different aspects of Japanese culture.

Marine Day reflects Japan’s historical and economic relationship with the sea.

Obon reflects the importance of family, ancestors, remembrance, and community traditions.

By understanding the meaning of these occasions, checking schedules in advance, and participating respectfully, international residents can enjoy the Japanese summer with greater confidence.

At Tokyo Garden House, residents can experience everyday life in a peaceful Tokyo neighborhood while benefiting from the general local knowledge of a Japanese owner.

Learning about seasonal customs such as Marine Day, Obon, and Bon Odori can make living in Japan more interesting, connected, and meaningful.