EndedFestivals & FireworksYamagata

Onogawa Onsen Hotaru Matsuri (Firefly Festival)

Name: Onogawa Onsen Hotaru Matsuri (Firefly Festival)
Start: 2026-06-20
End: 2026-07-20
Location: Onogawa Onsen Hotaru Park & Onsen District

小野川温泉ほたるまつり

Experience a magical summer night with dancing fireflies and a lively hot spring town atmosphere at Onogawa Onsen.

Official site

Yamagata Festivals & FireworksEnded

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Schedule

June 20, 2026 00:00 – July 20, 2026 23:59

Onogawa Onsen Hotaru Matsuri (Firefly Festival)

Guide6 min read

The Onogawa Onsen Hotaru Matsuri is a quintessential summer event held in the Onogawa Onsen district and Hotaru Park in Yonezawa City, Yamagata Prefecture.

Highlights

Firefly WatchingFood StallsStage Events

Read the guide

About Onogawa Onsen Hotaru Matsuri (Firefly Festival)

For Firefly Watching: Join the free 'Firefly Guide' starting around 20:00 to see the three species up close with expert guidance.
For Food Lovers: Visit on the dates when food stalls are active (June 20, 21, 27, 28) to enjoy local snacks and drinks.
For Entertainment: Don't miss the stage events on July 4 and 5, featuring traditional arts and comedy.
The Perfect Stay: Combine your visit with an overnight stay at an Onsen ryokan for the ultimate summer experience.

Weather forecast

Tue

9/1

25°/21°

67%

Wed

9/2

30°/21°

94%

Thu

9/3

25°/19°

100%

Fri

9/4

26°/19°

96%

Sat

9/5

24°/20°

31%

Sun

9/6

21°/19°

26%

Mon

9/7

27°/19°

39%

See full forecast

Tips

Etiquette
To protect the fireflies, flash photography and bright lights are strictly prohibited. Please remain quiet and do not touch the insects.
Traffic Restrictions
On June 20, 21, 27, and 28, the streets will be closed to vehicles from 17:00 to 21:30.
Trash
Please ensure you take all your trash back with you.

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