温おん泉せん卵たまごおんせんたまごMeanings1nounhot spring egg; slow-cooked egg with soft white and firm yolkA Japanese egg dish traditionally cooked in hot spring water, resulting in a custard-like white and a firm yolk. Often served in hot spring resorts.温おん泉せん卵たまごは、黄き身みが固かたまっていて白しろ身みがとろりとし