[Image1]The season for fireflies has arrived again.Kikuchi City is a famous firefly spot known as “Japan’s n

The season for fireflies has arrived again.
Kikuchi City is a famous firefly spot known as “Japan’s number one firefly home.”

You can see them along the Nikakiga River and the Watase River in the Asahi-shi area of Kikuchi City.

The places where you can see fireflies in Japan are decreasing year by year.
Fireflies do not only thrive where the water is pristine.
They prefer places with gentle water flow, sandy or gravelly riverbeds, low ambient light, quiet surroundings, and the presence of freshwater snails such as kawanina.
They favor these limited types of habitat.

As global environmental issues worsen, the habitats where fireflies can live are also shrinking.
Even so, you can still see many fireflies in Kikuchi City.

Fireflies spend their larval stage growing in the water for about a year while storing food.
They then pupate and emerge as adults.
As adults, they live for about two weeks.
In other words, out of the 365 days of the year, the period when you can enjoy fireflies is only about two weeks.

Also, adult fireflies do not eat.
They spend their adult lives without feeding.

The fireflies we watch are living through a life that ends in a flash.
Each year we can see them because, despite that short life, they reliably pass their life on to the next generation.

We are very happy that fireflies can be viewed in Kikuchi City again this year.
Please come and visit Kikuchi City to enjoy firefly viewing.

□ Best viewing times
・Nikakiga River: mid-May
・Watase River: mid-May to late May

□ Viewing areas
・Kikuchi City, Asahi-shi Obara (Obara district)
・Kikuchi City, Asahi-shi Fumoto (Takayanagi district)

□ Parking…parking available in each district
・Obara district parking (Fridays, Saturdays, Sundays only, 200 yen) (May 11–early June)
・Takayanagi district parking (free) (May 17–early June)

□ Viewing etiquette
・Do not shine flashlights or lights at the fireflies
→ Fireflies dislike strong light.
Shining phone lights or using a flash can cause them to hide.
It also disturbs other viewers.

・Do not make loud noises or cause disturbances
→ Loud noise will scare the fireflies and bother nearby residents.
Please be considerate as viewing takes place at night.

・Do not catch or take them home
→ Adult fireflies can fly for only one to two weeks.
Enjoy watching them living in the wild.

・Take your trash home with you
→ Fireflies live in clean environments.
Let’s all protect the beautiful natural environment.

・Follow traffic rules
→ Viewing takes place at night.
Please watch for people stepping onto roads.
Road restrictions may be in place around viewing areas during the viewing season.
Please cooperate to help keep viewers safe.

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Apr. 24, 2025
Kikuchi Gorge: a breathtaking retreat of fresh verdant beauty Kikuchi Gorge, a signature attraction of Kikuchi City in Kumamoto Prefecture, is a stunning canyon chosen as one of Japan’s Top 100 Forest Bathing Sites, Top 100 Famous Waters, and Top 100 Waterfalls. About 17 km east of central Kikuchi, it lies on the northwestern slopes of the Aso outer rim at elevations between 500 m and 800 m, spanning a vast 1,193 hectares of peaceful woodland. A cobalt-blue stream so clear that the trees reflect on its surface runs through the gorge. The average water temperature stays around 14°C year-round. On bright blue-sky days the water turns an even deeper blue as sunlight filters through the trees, creating a beautiful scene. In May the contrast between fresh green leaves, the sky, and the stream is especially striking. You can hear the gentle flow of the river and birdsong, and see many wildflowers in bloom. Well-maintained trails run through the gorge, with clear signs to guide you, so you can take a relaxed walk through the primeval forest. The gorge also features many waterfalls, including Shijusanman Falls, Reimei Falls, and Ryugafuchi, all selected among Japan’s Top 100 Waterfalls. Be sure to find your favorite. Rest facilities with a souvenir corner sell items such as coffee made with the gorge’s delicious water, allowing you to unwind while overlooking the canyon. In spring you can feel new life in the fresh green leaves after winter. Summer makes the gorge an ideal cool retreat, often described as a natural air conditioner with its crisp, cool air. Autumn brings colorful foliage, and winter offers a clear, bracing atmosphere. Please experience Kikuchi Gorge through all four seasons. ■ About Kikuchi Gorge ■ 〇 Open season: April 1–November 30 (typical) 〇 Hours: 8:30–17:00 〇 Maintenance cooperation fee: 300 yen per person for high school students and older ※ The receipt for the cooperation fee includes a 200-yen discount voucher usable at Kikuchi Onsen day-use baths. Parking First parking lot: approx. 80 spaces / 7 large vehicle spaces Second parking lot: approx. 45 spaces (open during busy periods only) Central parking lot: approx. 80 spaces (open during busy periods only) A free shuttle bus operates from the central parking lot during Golden Week and other busy periods. Parking fees Standard car: 300 yen Motorbike: 200 yen Microbus: 1,000 yen Large vehicle: 2,000 yen Kikuchi Sightseeing Shared Taxi A reservation-based shared sightseeing taxi links major Kikuchi City attractions (including Kikuchi Gorge) with the city center. It operates on Saturdays, Sundays, national holidays, substitute holidays, and Golden Week. Service is suspended during the New Year holidays (December 29–January 3). Take a deep breath at Kikuchi Gorge. Bask in negative ions and enjoy a leisurely moment in nature.