Hakone Lake Ashi Summer Festival Week Fireworks
A Hakone summer tradition where fireworks light up the lakeside every night for six days from July 31 to August 5. On the opening night, the 'Kosui-sai Fireworks Display' accompanies the eve-of-festival rites at Hakone Shrine, honoring the lake's guardian deity Kuzuryu Myojin with offerings of sekihan (red rice), as approximately 5,000 fireworks and underwater fireworks paint the night sky and lake surface. On the final night, the 'Torii-yaki Festival' features the burning of two large torii gates set afloat on the lake, creating a mesmerizing scene of flames and fireworks reflected on Lake Ashi. With venues rotating between Moto-Hakone Bay, Hakone-en Bay, and Kojiri Bay each night, staying overnight to enjoy multiple fireworks displays is the ideal way to experience this event.
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Event Info
auto_awesomeHighlights
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The two main highlights are the Kosui-sai Fireworks Display (approx. 5,000 fireworks) on the opening night and the Torii-yaki Festival Fireworks Display (approx. 3,500 fireworks) on the final night. The burning of large torii gates set on the lake is a mystical scene unique to Hakone. Underwater fireworks reflected on the lake surface are stunning, and the reverberating sound of fireworks echoing off the surrounding mountains adds to the spectacle.
history_eduHistory & Origins
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These are traditional events related to Hakone Shrine's annual grand festival. The Kosui-sai is a ritual offering sekihan to the lake's guardian deity Kuzuryu Myojin. The Torii-yaki is based on a legend of offering flames from the lakeside torii to the dragon deity. Both have long histories as Hakone summer traditions.
event_repeatPast Editions
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An annual summer event centered on Hakone Shrine's grand festival, with fireworks launched at various lakeside locations over six days from July 31 to August 5. Hakone Shrine was founded in 757 by Priest Mangan and has a history of 1,268 years, but the 'Lake Ashi Summer Festival Week' fireworks began around 1990, approximately 35 years ago. The lakeside fireworks create enchanting reflections on the water surface, with different hot spring areas (Moto-Hakone, Hakone-en, Hakonemachi, Ashinoyu, etc.) taking turns launching fireworks.
directionsAccess
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Take the bus from Hakone-Yumoto Station on the Hakone Tozan Railway for about 35 minutes to 'Moto-Hakone.' By car, about 25 minutes from Hakone-guchi IC on the Odawara-Atsugi Road via Hakone Shindo.
groupsCrowd Forecast
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The opening Kosui-sai and final Torii-yaki nights are especially crowded. If your accommodation offers a view, watching from your room is the most comfortable option. Lakeside viewing spots require early arrival to secure a good position.
hotelBook a hotel in 神奈川県 足柄下郡箱根町 earlyPRchecklistTips & What to Bring
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With fireworks every night for six days, staying at a Hakone hot spring inn and enjoying multiple shows is ideal. Evenings by the lake can be cool even in summer, so bring a light jacket. Some hotels offer views of the fireworks from every room — check in advance.
Get Ready
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PR一休.com / じゃらん遊び・体験
10/19〜10/25、
神奈川おすすめ
いちばんの注目は愛川町ふるさとまつり。
秋のうまいもの
雨の日でも楽しめる
家族で楽しむ
Visitor Report
Beginning with the 'Kosui-sai' ceremony honoring Lake Ashi's guardian deity Kuzuryu Myojin, fireworks are launched every night for six days in this quintessential Hakone summer event. Approximately 5,000 fireworks are set off at different lakeside venues — Moto-Hakone Bay, Hakone-en Bay, and Kojiri Bay — illuminating both the night sky and the lake surface in a spectacular display. The moment underwater fireworks bloom on the lake surface and large starmines spread across the sky is a mesmerizing beauty found nowhere else. Along the lakeshore, sacred fires blaze powerfully, and underwater fireworks painting both the lake and sky in vivid colors are described as extraordinary. Fireworks cruises on the Hakone pirate ships are also available, offering the luxurious experience of watching fireworks up close from the water. Food stalls line the area around the venues, allowing visitors to enjoy gourmet treats alongside the fireworks. Watching fireworks in the relaxed atmosphere of a hot spring resort offers an elegance distinct from urban fireworks festivals, making this a highlight of Hakone summers that captivates many tourists.
* Compiled from multiple websites and social media sources.
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