—Hakone must-try black eggs Owakudani 🩷❤️🧡💛🤍

During the Edo period, Hakone's Ōwakudani was known as "Jigokudani" or "Great Hell."

On August 5, 1873, just before the visit of Emperor Meiji and Empress Michiko, the area was renamed Ōwakudani. The opening of the Hakone Ropeway in 1983 significantly improved access. Black eggs, cooked using local geothermal heat, are a local specialty.

On April 17, 2014, the Hakone Geological Museum opened in Ōwakudani. To the north of Mount Hakone's sacred mountain lies the Ōwakudani Garden, featuring the approximately 600-meter-long Ōwakudani Nature Research Trail.

Ōwakudani accounts for 26.3% of the total heat released by Hakone Volcano.

According to a survey conducted in the 1960s, Ōwakudani's fumaroles have a temperature of approximately 95°C to 143°C and are composed of 98% water, along with various other substances such as hydrogen sulfide and carbon dioxide. [23] In 2013, a swarm of earthquakes at Hakone Volcano led to the creation of new fumaroles and a change in the composition of the gases emitted.

Hot Springs
Hakone Hot Spring Supply Co., Ltd. was established in 1930. It utilizes hot springs heated by the oozing of Ōwakudani's jets and provides hot springs to inns in areas like Sengokuhara and Gora, which had no known sources at the time.

Post by ClaCla | Aug 26, 2025