福島県·郷土料理
Radium Tamago (Radium Egg)
When you crack the shell, the white is soft and semi-cooked, while the yolk is thick and rich. Slowly heated in the hot spring source, these eggs have a mellow texture that is completely different from ordinary boiled eggs—this is Iizaka Onsen's specialty, Radium Tamago. The name originates from the fact that Iizaka Onsen was the first place in Japan where radium was confirmed to exist. It is said that this long-beloved hot spring egg was named "Radium Tamago" and marketed as a souvenir during the Taisho era. Steeped for about an hour in natural spring water at approximately 70 degrees Celsius, the eggs finish with a subtle aroma unique to the hot spring. This is a true taste of the hot spring town, having been certified as one of the Agency for Cultural Affairs' "100 Year Foods" in 2023.
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