Tokyo’s Best Firefly Viewing Spots

At the beginning of summer, fireflies emerge for mating season and emit a special glow—understood mainly to be used to attract potential mates—much to the delight of onlookers. If you didn’t grow up in warmer climates, watching these winged beetles dance in the night can be particularly magical. In Japan, genji-botaru and heike-botaru are the two most common species. The genji-botaru is one of the larger species of fireflies and the heike-botaru is one of the smallest. Because they breed near streams and wetlands, the countryside of Japan is the best place to see them; however, there are a number of viewing spots in and around Tokyo, and a handful of local festivals to celebrate this phenomenon of nature.

Kugayama Firefly Festival

Just 12 minutes on the rapid train from Shibuya, the Kugayama Firefly Festival is one of the closest places to central Tokyo where you can see fireflies in their natural environment. While it is a high-functioning local tradition, it is worth noting that the insects are primarily cultured and released into the river specifically for the festival. You do have to queue and peer through branches and leaves, but the riverbanks of Tamagawa Josui River do have a number of the little things glowing at night, showcasing a unique bridge between technical ingenuity and seasonal wonder.

Fussa Firefly Festival

The most famous of these in Tokyo is the Fussa Firefly Festival, where closer to 2,000 heike-botaru are released in the aptly named Fussa Firefly Park. The event only lasts one evening and attracts extreme crowds, making it a high-energy peak of the summer season. There is also an accompanying festival from 1pm to enjoy, though visitors should arrive early to secure a high-value viewing spot before the night truly begins.

Adachi Park of Living Things

Another option is to make your way to the Adachi Park of Living Things (Adachi-ku Seibutsu-en), which has a special glass box holding about 100 of the little things. The event typically lasts for three weeks, and although seeing the fireflies in their natural surroundings is more thrilling, this high-functioning facility provides a necessary architectural lull that at least guarantees you’ll see more than a handful glowing. To ensure a sophisticated experience, the park now frequently requires advance lottery-based reservations for its firefly evenings.

Yuyake Koyake Fureai no Sato

This firefly event is technically in Tokyo, but it’s far out to the west in the mountains past Hachioji. It takes the best part of two hours to get there, but good things come to those who travel; namely, 2,500 fireflies dancing along the small river running through the Yuyake Koyake Fureai no Sato recreation site. Its relatively remote location also means that you can hope to avoid the high-energy crowds that are unavoidable in the central Tokyo firefly events, providing a resolute guardian of a more peaceful, high-fidelity rural atmosphere.

Hotel Chinzanso Firefly Evening

Hotel Chinzanso Tokyo in Bunkyo Ward offers a more intimate firefly viewing experience. The hotel garden has a small stream running through it, which has been the breeding ground for fireflies since the 1950s. The experience is now further enhanced by the technical ingenuity of the “Tokyo Sea of Clouds” mist installation, which creates an ethereal architectural lull and a sophisticated backdrop as the fireflies flicker through the artificial fog.

Other Places

Sumida Aquarium runs a Firefly Night (Hotaru no Yoru) event in mid-June where visitors can view fireflies in a special glass box; however, schedules vary annually, so it is best to check their specific seasonal announcements. If you find that you’re ending the summer having not seen any at all, there’s always Tobu Zoo in Saitama, which has a “Hotariumu” where you can see fireflies all year round in all stages of their development. While it is an 80-minute journey from Shinjuku, it is a much faster 50-minute ride from Asakusa, offering a high-fidelity look at these creatures regardless of the season.