Fukagawa Hachiman Matsuri (Mizukake Water-Splashing Festival)

Ranked alongside the Sanja and Kanda festivals as one of Edo’s three great matsuri, the Fukagawa Hachiman Matsuri turns a serious Shinto procession into one of the wettest, most joyfully chaotic events in Tokyo’s summer calendar.

Why It’s Interesting

Centered on Tomioka Hachimangu, Tokyo’s largest Hachiman shrine, the festival’s nickname — mizu-kake matsuri, the water-splashing festival — comes from its defining ritual: as neighborhood associations carry their mikoshi through the streets, firefighters, residents, and total strangers douse the bearers with bucket after bucket of water, both as purification and as relief from the August heat. Spectators aren’t just tolerated joining in — they’re expected to. While a smaller version happens every year, the full hon-matsuri — with more than 50 mikoshi carried along an 8-kilometer route — only happens once every three years, and 2026 is one of those years, making this a rare chance to see Fukagawa at full scale.

Best Time to Visit

The festival runs August 12-16, 2026, building to its climax on Sunday, August 16 with the all-day Grand Mikoshi Procession.

Getting There

Five minutes from Monzen-Nakacho Station on the Tozai or Oedo lines; expect street closures and dense, soaked crowds near the shrine on the main procession day.