When darkness falls over the Seto Inland Sea on Sunday, September 20, 2026, the shoreline of Innoshima — a quiet citrus-growing island halfway along the Shimanami Kaido — will blaze with torchlight, war drums and dancers in medieval costume. This is the Innoshima Suigun Matsuri, one of Hiroshima Prefecture's most atmospheric festivals, and 2026's edition (the combined "Shima-Hi Matsuri," or island-and-fire festival) lands neatly on the Silver Week holiday weekend. If you have ever wanted to see a Japanese festival that feels genuinely local, historic and a little wild, this is the one to plan around.
Who were the Murakami pirates?
From the 14th to the 16th century, the narrow straits of the Geiyo Islands between Honshu and Shikoku were controlled by the Murakami clan — often called the Murakami Suigun (navy) or Murakami Kaizoku (pirates). They were less cutthroat raiders than masters of the sea: they piloted ships through treacherous tidal currents, levied tolls on passing vessels, fought naval battles for warring daimyo, and built fortress networks on the islands. Innoshima was the stronghold of one of the three main branches of the clan, and their story — recognized as an official Japan Heritage — still defines the island's identity. The hilltop Innoshima Suigun Castle, a museum built in castle style, displays the clan's armor, weapons and nautical charts, and is well worth a visit on festival day (it also provided the cover image for this guide).
What happens at the festival
The Innoshima Suigun Matsuri traditionally unfolds in stages, and the September 20 event combines the celebratory "island festival" with the famous fire festival on the beachfront festival grounds at Shimanami Beach on Innoshima's northern shore. Expect a full afternoon and evening of entertainment: performers in samurai-era armor reenacting the departure of the Murakami fleet, thunderous jindaiko war-drum performances, and teams of local dancers competing in the energetic, freestyle "choraku-mai" dance that has become the festival's modern signature.
The emotional peak comes after sunset, when giant torches are hoisted and paraded across the sand, bonfires are lit, and the beach turns into a sea of flame and drumbeats — a scene meant to evoke the signal fires the Murakami navy once used to command the straits. It is loud, hot, smoky and unforgettable, and because Innoshima sees far fewer international visitors than Onomichi or Hiroshima city, you will be experiencing it shoulder to shoulder with islanders rather than tour groups.
Admission is free, food stalls line the venue, and the festival runs into the evening. Check the local timetable when you arrive: afternoon events typically begin mid-afternoon, with the fire program after dusk (around 18:30–20:30 in past years).
Getting to Innoshima
Innoshima belongs to Onomichi city and sits two islands south of the mainland along the Shimanami Kaido, the famous 60-kilometer island-hopping expressway and cycling route.
By public transport, take the JR Sanyo Line to Onomichi Station (about 90 minutes from Hiroshima, or 20 minutes from the Shinkansen stop at Shin-Onomichi/Fukuyama connections), then a local bus toward Innoshima; buses cross the bridges and reach the island in roughly 30–40 minutes. On festival day, expect extra crowds on the last buses back — check the return timetable in advance or plan to stay on the island.
By bicycle, Innoshima is one of the most satisfying day rides in Japan. Rent a bike in Onomichi, ferry across to Mukaishima, and ride the dedicated cycle path over the Innoshima Bridge — the festival makes a perfect turnaround point before you ride back in the evening (bring lights) or send the bike back and bus home.
Make it a Silver Week weekend
September 19–21, 2026 is a three-day weekend in Japan (Respect for the Aged Day falls on Monday the 21st), and Onomichi is the ideal base.
Spend Saturday in Onomichi itself: ride the ropeway up to Senkoji Temple for the classic panorama of the town's slopes, temple roofs and the island-studded sea, then wander down through the hillside lanes of the Temple Walk, the cat alley and the retro shopping arcade. Art lovers have a bonus this year: the Onomichi City Museum of Art, perched in the park near Senkoji, opens its autumn special exhibition on September 19 — an installation show by salt artist Motoi Yamamoto, whose intricate labyrinths made entirely of salt meditate on memory and the sea. It is an eerily fitting companion piece to a weekend spent among maritime history.
Sunday is festival day on Innoshima. Go early if you want to combine it with the Suigun Castle museum and a hassaku-orange sweet — the hassaku citrus was born on Innoshima, and the local hassaku daifuku (mochi stuffed with citrus and white bean paste) is the island's must-try snack. Monday, if your legs allow, ride a longer stretch of the Shimanami Kaido toward Setoda on Ikuchijima, famous for lemon groves and the sunset-viewing beach.
Practical tips
September on the Seto Inland Sea is still warm — expect 24–29°C in the afternoon and mild evenings; bring a light layer for the ride or bus home. The fire festival takes place on sand, so wear shoes you don't mind getting ashy. Book Onomichi accommodation early: Silver Week is a domestic travel peak, and the town's guesthouses fill up fast. Cash is still king at festival food stalls. And if you are cycling, reserve your rental bike online — holiday weekends regularly sell out.
Few festivals compress so much of the Seto Inland Sea's character into one evening: history you can hear in the drums, geography you can see from the bridge, and a bonfire glow that has been signaling across these straits, in one form or another, for six hundred years.
Image: Innoshima Suigun Castle, CC BY-SA 4.0, via Wikimedia Commons
