Under the island of Japan, it’s shaking. Why? Because of the four tectonic plates that meet a thousand meters beneath the earth’s surface. The energy released there, deep in the ground, has gifted the populace with one of the country’s greatest natural treasures: onsen – Japanese hot springs.

Onsen in Japanese culture

No trip to Japan is complete without a visit to an onsen. These onsen–natural, thermal hot springs–now often include bathhouses and resorts, and have long offered a place for recreation and relaxation.

The water of the onsen comes from a geothermal spring and is heated by the underground volcanic activity. Onsen water contains a large number of minerals that are extremely beneficial for the skin, circulation and general health.

In addition, the onsen hold an important place in Japanese culture. They are a popular tourist attraction and are also a common destination for locals looking for a weekend getaway.

Culinary treasures

The onsen are not only used for wellness and relaxation, however: they also play an important role in Japanese food culture, including the onsen egg (onsen tamago in Japanese).

To make the onsen tamago, eggs are cooked in small baskets in the hot springs. The cooking process takes about an hour, with the water at a consistently low temperature between 62°C and 69°C.

This low-temperature cooking is what makes the onsen eggs special: the egg white does not set completely and the yolk has a soft, even, and extremely creamy texture.

From the hot springs of Japan to an egg cooker in your home

Onsen eggs, served in countless variations, have been a key component of Japanese cuisine for hundreds of years. The onsen egg is known as “the perfect egg” to chefs around the world, and the art of preparing this perfect egg has been conquered by many Michelin-starred restaurants.

However, since we are not all lucky enough to have a hot spring on every corner, Nihon offers the unique opportunity to easily prepare onsen eggs in your home. With Nihon, it is possible to bring a piece of Japanese culture into your own living room – and to enjoy a perfect egg.

This is a truly unique pleasure that is worth supporting. Come read more about our campaign on Kickstarter, and help us inspire others about the wonders of Japanese cuisine.