Published October 20, 2026 at 7:57 PM JST

Every August the streets around Tomioka Hachimangu in Koto Ward fill with portable shrines and cheering crowds, and onlookers douse the bearers with water in a beloved summer purification tradition.

Quick answer: The Fukagawa Hachiman Matsuri is the annual festival of Tomioka Hachimangu in Koto Ward, Tokyo, and is counted among the three great festivals of Edo. It is typically held around mid-August, and organizers set the exact days each year. What makes it special is the water: spectators splash the people carrying the mikoshi, or portable shrines, as a cooling and purifying blessing, and the biggest version of the festival comes once every three years.

A Summer Festival Built Around Water

The Fukagawa Hachiman Matsuri is the main yearly festival of Tomioka Hachimangu, a well-loved shrine in the Fukagawa district of eastern Tokyo. It is also widely known as the Mizukake Matsuri, which simply means the water-splashing festival. Even in the heat of a Tokyo August, the mood on the streets is warm and playful rather than formal, and neighbors, children and visitors all take part in the fun.

The idea is easy to grasp. Teams of bearers lift heavy mikoshi onto their shoulders and walk them through the neighborhood to rhythmic shouts. Along the roadside, people lean in with buckets, hoses and other water sources and send water over the bearers and the shrines. Guides describe this water as a way to purify the mikoshi and the people carrying them, and it also helps cool the bearers on a hot summer day.

Because of this, the festival is often described as a symbol of summer in Tokyo. Admission to watch the procession is free, and the whole event feels like a shared neighborhood celebration that visitors are warmly invited to enjoy from the sidewalks.

History and Roots in Edo

Tomioka Hachimangu was founded in 1627, according to Japanese guides to the shrine. An account of its history notes that it first stood on a small island surrounded by sea and was originally called Eitaijima Hachimangu. It received its present name in 1685, after a message said to have come in a divine revelation. The grounds today include many smaller sub-shrines, and the shrine is often described as a major Hachiman shrine of the old Edo area.

The shrine also has a place in sumo history. Guides note that the first officially approved fundraising sumo tournaments of the Edo period were held on its grounds, and a large stone monument inscribed with the names of past yokozuna stands there today. Near the entrance there is a statue of Ino Tadataka, the surveyor who is remembered for his careful maps of Japan and who is said to have lived nearby and prayed here for safe travels.

The festival belongs to a famous group. Along with the Sanno Matsuri of Hie Shrine and the Kanda Matsuri of Kanda Myojin, the Fukagawa Hachiman Matsuri is counted among the three great festivals of Edo. One tourism guide describes the festival as having about 380 years of history, which matches the shrine's seventeenth-century founding.

The Three-Year Rhythm of the Festival

The festival is held every year, but its size changes in a repeating three-year cycle. The largest version is called the hon-matsuri, or main festival, and it takes place once every three years. In that year the many neighborhood mikoshi gather for a joint procession, which is the highlight of the whole cycle. The year 2026 was a hon-matsuri year, according to Time Out Tokyo and other guides.

An English-language local guide explains the other years as follows. In the year after the main festival, a smaller shrine festival centers on a single mikoshi that is carried through seven districts in one day, and water is still splashed on it on a smaller scale. In the year before the main festival, the focus shifts to children, who carry small mikoshi through the streets while chanting with great energy.

This cycle means the festival always has something to offer, but visitors who want the grandest scene should check whether the year in question is a main festival year. The shrine publishes its schedule on its official website, and that is the most reliable place to confirm the details before traveling.

Mikoshi, Bearers and the Grand Procession

In a main festival year, more than 50 mikoshi take part in the joint procession, according to guides. A Japanese source on the shrine puts the number of neighborhood mikoshi at 53, and the shrine's own mikoshi joins the celebrations. Descriptions of the route say it covers roughly 8 kilometers and runs from morning until evening, with each neighborhood association carrying its own shrine through the streets.

The shrine owns two large mikoshi of its own. A Japanese guide describes the first, the Ichinomiya mikoshi, made in 1991, as more than 4 meters tall and weighing about 4.5 tons including its poles, decorated with precious stones. It is not carried through the streets during the festival but displayed in the shrine grounds. A second mikoshi made in 1997 weighs about 2 tons and needs a large team of roughly 200 bearers.

For the main procession in 2026, Time Out Tokyo listed a start of 7:30 a.m. on Sunday, August 16. Times and routes are set by the shrine each year, and the shrine's website offers a procession map, so it is wise to look at the latest version before heading out.

What Happens During the Festival Days

Activity at the shrine grounds usually runs for several days rather than a single afternoon. In 2026, for example, Time Out Tokyo listed events on the grounds from August 12 to 16, including a koto and shamisen performance on August 14 and a jazz performance on August 15. These smaller events give visitors a gentle way to enjoy the shrine in the days around the main procession.

The mood changes with the day. In the early hours, the bearers gather and set out with loud, rhythmic chants. As the sun rises higher, the streets fill with spectators carrying buckets or standing ready beside hoses. Local fire brigades are mentioned in guides as taking part in the water splashing, and popular spots such as the Saga 1-chome intersection are known for big splashes as mikoshi arrive.

The festival is as much about the people as the shrines. Neighborhood groups wear matching happi coats, children cheer from the sidelines, and the shouts of the bearers carry through the blocks. Even a short stroll along the route gives a sense of how deeply the festival is woven into everyday life in Koto Ward.

Tips for Enjoying It as a Visitor

The nearest stations are Monzen-Nakacho on the Tokyo Metro Tozai Line and the Toei Oedo Line. A local guide gives a walk of about three minutes from the Tozai Line exit and about six minutes from the Oedo Line, and lists Etchujima Station on the JR Keiyo Line as a longer walk of around fifteen minutes.

Come ready to get wet. Guides stress that the water pressure can be strong, and they suggest waterproof covers or cases for phones and cameras. Lightweight clothing that dries quickly is a sensible choice, and a small towel helps too. If you would rather stay dry, you can watch from the shrine grounds or from a spot a little back from the splashing zones.

Keep a cheerful and respectful attitude. The bearers are working hard in the summer heat, and the splashing is part of the tradition, so join in the spirit of the festival, follow the instructions of local staff and stay clear of the carried shrines. Crowds can be large in a main festival year, so plan extra time, drink plenty of water and take breaks in the shade.

Food and Neighborhood Highlights

Around the shrine, stalls usually serve festival favorites such as yakisoba, takoyaki, grilled squid and shaved ice, according to a local guide. After the procession, the streets near Monzen-Nakacho offer a chance to try local dishes. Fukagawa-meshi, a clam and rice dish, and monjayaki, a savory griddle pancake, are both described as specialties of the area.

The shrine itself is worth a slow visit. You can look at the yokozuna monument, see the statue of Ino Tadataka and walk among the many smaller shrines on the grounds. On other days of the month, the shrine holds regular monthly rites, and an antiques market is held on certain Sundays, so the area is pleasant to explore outside festival time as well.

Together, the water, the mikoshi and the neighborhood spirit make the Fukagawa Hachiman Matsuri one of the most cheerful ways to experience an Edo-era tradition that is still alive in modern Tokyo.

Frequently Asked Questions

When is the Fukagawa Hachiman Matsuri held?

The festival is typically held around mid-August, centered on August 15, and the organizers at Tomioka Hachimangu set the exact days each year. In a main festival year, the big procession can fall on a weekend near that date, and in 2026 it was listed for Sunday, August 16. Check the shrine's official website before planning.

Why do people splash water on the mikoshi?

Guides describe the water as a purification for the mikoshi and the people carrying them, and it also cools the bearers during the summer heat. Spectators use buckets and hoses along the route. Visitors who stand near the splashing zones should expect to get quite wet.

How often is the main festival held?

The largest form of the festival, called the hon-matsuri, is held once every three years, and 2026 was a main festival year. The years before and after have smaller versions, including a children's mikoshi year and a single-mikoshi year, according to a local guide. The shrine's website confirms what is planned each year.

Further reading: the Time Out Tokyo page on the Fukagawa Hachiman Matsuri, a local guide to the water-splashing festival and how to join and a Japanese guide to Tomioka Hachimangu and its festival.

Keep exploring: Sanja Matsuri in Asakusa: Three Days of Mikoshi, Music and Joy; Tori no Ichi in Asakusa: Lucky Rakes and Hand-Clapping Cheer; Asakusa Samba Carnival: Rio-Style Rhythm Beside Sensoji Temple; Kawagoe Festival: Little Edo's Revolving Floats and Hikkawase Duels.