Koajiro no Mori, which is adjacent to the Riviera Seabornia Marina, is one of the leading firefly outbreak sites in the Kanto region. It is open at night for a limited time and you can enjoy the flight of fireflies.Fireflies, which spend their larval period underwater, cannot live without a clean river throughout the year and illuminate the Koajiro no Mori with gentle light.
The Riviera staff also volunteers to guide you so that you can observe safely.Why don't you take a walk in the fantastic night forest where countless lights dance in the darkness.

Koajiro Forest

Koajiro Forest boasts a vast area of ​​about 70ha facing Sagami Bay at the tip of the Miura Peninsula.
It is said to be the only natural environment in the Kanto region where forests, wetlands, tidal flats, and the sea are left in a row, and many organisms including rare species inhabit. From late May to early June, you can enjoy a fantastic landscape where many fireflies blink every year.