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Seiro Natsu Matsuri Kaijo Hanabi Taikai

聖籠夏まつり海上花火大会

Seiro Natsu Matsuri Kaijo Hanabi Taikai is a fireworks festival held in Niigata. Date: First Sunday in August (kaijo hanabi). Total shells: about 約400. Attendance: Not confirmed in the sources checked (2026-10-20 pass). No. 3回（聖籠夏まつり第28回）

Event essentials

Headline stats

Total Shells
約400
Duration
45 min
Nights
1 night(s)
Attendance
Not confirmed in the sources checked (2026-10-20 pass)
Largest Shell
2026-10-20 の調査では確認できず
Founding Year
2024, when the marine fireworks were separated from the Tahara festival five-town joint fireworks and given their own session (Japanese Wikipedia, list of Japanese fireworks festivals)

Signature Sequences

  1. 01Split out of the Tahara festival joint fireworks in 2024 and run as its own session
  2. 02Fired from about 250 m offshore from Ajishiro Beach
  3. 03The finale on the first Sunday of August, the second day of the 28th Seiro Summer Festival
  4. 04400 shells, largest shell 10 shaku (about 30 cm)
  5. 05Free viewing, no paid seats

Venue & Access

Time Window
20:00-20:45 (~45 min)
Venue
Ajirohama Swimming Beach / offshore 250m
Address
Ajishiro Beach and the Seiro Town Sea Amusement House, Seiro Town, Kitakanbara District, Niigata, firing from about 250 m offshore 38.007525°N, 139.251535°E
Venue Size
2026-10-20 の調査では確認できず
Venue Floor Type
屋外（網代浜海水浴場沖合約250mからの海上打ち上げ）
Gates Open
16:00（グルメ屋台）／20:00（海上花火）
Paid-Seat Holder Entry
Not applicable - the festival has no paid seats
Spectator Capacity
2026-10-20 の調査では確認できず
Production Company
2026-10-20 の調査では確認できず
Sponsor
Organiser: the Seiro Summer Festival Executive Committee at the Seiro Chamber of Commerce; enquiries through the Seiro Town Tourism Association, 0254-27-2111

Access

Venue map

View on Google Maps

From major cities

From Tokyo
2026-10-20 の調査では確認できず
From Osaka
2026-10-20 の調査では確認できず
From Sendai
2026-10-20 の調査では確認できず
Nearest Station
JR Sasaki Station on the Hakushin Line, about 15 minutes by car
Nearest Shinkansen
The nearest station is JR Sasaki Station on the Hakushin Line; it is not a Shinkansen station
Local Transit
Seiro-Shibata IC on the Nihonkai-Tohoku Expressway, about 15 minutes by car
Parking
About 1,000 parking spaces, shared across the two days of the Seiro Summer Festival
Parking Reservation
No reservation system is mentioned. The Niigata Prefectural Tourist Association gives about 1,000 spaces and the fireworks database 950 free spaces, and neither mentions reservations
Lodging Strategy
2026-10-20 の調査では確認できず
English Access
2026-10-20 の調査では確認できず
Cash Required
2026-10-20 の調査では確認できず
Best Arrival
Arrive in the late afternoon, since the gourmet stalls open at 16:00; the fireworks start at 20:00 and last only 45 minutes.
Peak Crowd
The 20:00-20:45 block of 45 minutes. On the Sunday the gourmet stalls open at 16:00, so the beach is busy well before the shells.

Tickets

Weather Policy

Rain
Held in rain; postponed to following day in storms
Decision Time
No decision time is published. The Minato Oasis Seiro listing says only that stormy weather cancels the event and that the marine grand fireworks alone are postponed to the next day, and no 2026 primary page carries a go/no-go announcement time
Postponement
Held in rain and postponed to the following day in stormy weather per the existing record; no postponement day is stated on the 2026 primary pages checked.
Wind Threshold
2026-10-20 の調査では確認できず
Typical Risks
August in Niigata carries the risk of stormy weather from Pacific depressions and typhoons.
Weather Cancellation History
2026-10-20 の調査では確認できず

Sources and verification

Related festivals

Sister Festivals

  • Tahara Matsuri / 5-cho Joint Hanabi Taikai (Seiro Town) - parent event before 2024 separation
  • Niigata East Port Matsuri (Kitakanbara-gun Seiro-cho) - same-area summer festival
  • Seiro Marine Festa (Kitakanbara-gun Seiro-cho) - simultaneous sea-leisure event

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