Entrusting Kitaibaraki’s memorial prayers to bon-bune sent out to sea
Otsu Bon-bune Nagashi
Festival information
EVENT INFORMATION- Season / frequency
- The 16th day of the lunar-calendar season in August
- Location
- The wharf in Otsu Port
- Area
- Ibaraki Prefecture・Kitaibaraki City(From Tokyo: approx. 1 h 10 min–1 h 30 min · limited express)Prefecture-level estimate to a main station or airport, not the venue. Airport access, check-in and onward travel are extra; remote areas and islands can take much longer.
- Features
- Wishes behind the festival
- Last updated
- 2026/10/19
Otsu Bon-bune Nagashi is a Buddhist summer-observance ritual held early in the morning on the 16th day of the lunar-calendar Obon season in Otsu, Kitaibaraki City. Families welcoming their first Obon after a death make bon-bune, place offerings and fresh flowers aboard, and gather at Otsu Port. After a joint memorial service and nenbutsu dance, the boats are carried offshore by fishing boats.
About Otsu Bon-bune Nagashi
Otsu Bon-bune Nagashi is a Buddhist summer-observance ritual held early in the morning on the 16th day of the lunar-calendar Obon season, when families welcoming their first Obon after a death send bon-bune out to sea.
The bon-bune, made from wheat straw or wood, carry white sails marked with the family’s boat name and the deceased’s posthumous Buddhist name, and are provided with incense, offerings, and fresh flowers.
As an intangible folk cultural property passed down in Otsu, Kitaibaraki City, it keeps local traditions of memorial observance alive.
Source: 大津の盆船流し – 茨城県教育委員会
Festival highlights
A highlight is the bon-bune, each crafted with distinctive details by the family.
The boats are fitted with features such as an engine room, smokestack, rudder, oars, and mast. Boatmen made from straw, watermelon, and eggplant are placed at the bow and rudder.
After a joint memorial service at the wharf in Otsu Port, the Tendai Buddhist nenbutsu dance known as “Jangara Nenbutsu Odori” is performed.
Entrusting Kitaibaraki’s memorial prayers to bon-bune sent out to sea
What to expect
For the ritual, families welcoming their first Obon after a death make bon-bune from wheat straw or wood and set white sails bearing the boat’s name and the deceased’s posthumous Buddhist name.
Incense is burned on the bon-bune, and offerings and fresh flowers are placed aboard before they gather at the wharf in Otsu Port.
After a joint memorial service and nenbutsu dance, the bon-bune are carried offshore by fishing boats and set adrift.
In recent years, the boats have been retrieved to avoid polluting the sea.
Location and access
- Venue and address
The wharf in Otsu Port.
The address is 89 Otsu, Kitaibaraki City.
Address 89 Otsu, Kitaibaraki City
Dates and season
- Season
The 16th day of the lunar-calendar Obon season in August
Accommodation and hotels PR
Showing nearby accommodation.
Prices and availability are current at the time of retrieval. For multi-night stays, only the first night’s price is shown. Confirm the final price and directions to the venue with the booking provider. Select your dates again when using the area search link. Search area: within 3 km of Central Ibaraki Prefecture / Kitaibaraki City (the search is not centered on the festival venue)
Tips for your visit
The bon-bune gather at the wharf in Otsu Port and are carried offshore after the memorial service and nenbutsu dance.
As the event takes place by the sea, please take care not to disrupt the proceedings or the movements of those involved when watching.
The bon-bune are retrieved after being set adrift.
Origins and History of Otsu Bon-bune Nagashi
Otsu Bon-bune Nagashi is a Buddhist summer-observance ritual passed down in Otsu, Kitaibaraki City, in which families welcoming their first Obon after a death send a bon-bune (memorial boat) out to sea.
In Showa 54March 8, it was designated an intangible folk cultural property of Ibaraki Prefecture.
Today, methods for retrieving the boats to avoid polluting the sea have also been adopted, allowing the tradition to be carried on while taking the environment into consideration.
Official information
The Ibaraki Prefectural Board of Education features Otsu Bon-bune Nagashi as a prefecture-designated intangible folk cultural property.
It is managed by the Otsu-machi Bon-bune Nagashi Preservation Society.
The page also includes related links to Kitaibaraki City and the Kitaibaraki City Tourism Association.
Otsu Bon-bune Nagashi at a Glance
Otsu Bon-bune Nagashi is a Buddhist summer-observance ritual in Otsu, Kitaibaraki City, in which families welcoming their first Obon after a death send boats out to sea to pay tribute to the deceased.
After a joint memorial service and “Jangara Nenbutsu Odori” at Otsu Port, the bon-bune are carried offshore.
Its distinctive features are the craftsmanship of boats made from wheat straw or wood and the memorial observances passed down by the sea.
Japanese Festivals.jp Editorial Team
Celebrating local culture and helping you discover a side of Japan you never knew.
Article updated: 2026/10/19
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