High Quality Content by WIKIPEDIA articles! Tokio Marine & Nichido Fire Insurance Co., Ltd. ( T ky Kaij Nichid Kasai Hoken Kabushiki-Kaisha ), commonly called Tokio Marine Nichido, is a property/casualty insurance subsidiary of Tokio Marine Holdings, the largest non-mutual private insurance group in Japan. Tokio Marine Holdings was formerly known as Millea Group, which underwent a name change in July of 2008. The company is one of the very few groups and individuals that still use the spelling Tokio for the city in the English language.