Sompo Japan Insurance Inc. (株式会社損害保険ジャパン, Kabushiki-Kaisha Songai Hoken Japan^?, TYO: 8755), or Sompo Japan (損保ジャパン), is a Japanese insurance company. It is the second-largest property insurance company in Japan only behind Tokio Marine, with market share of 19.3% in 2007.

The “Sompo” in the company's name means “property insurance” in Japanese, though Sompo Japan offers a range of financial services including life insurance, securities, asset management and venture capital businesses.

Tokyo Fire Insurance Company, Ltd. was established in 1887 as Japan's first fire insurance company. The company worked to cultivate an awareness of fire insurance, and five branch offices were added within a year. The major Yokosuka fire of 1890, however, nearly toppled the fledgling company.

In 1893, Japanese entrepreneur Zenjiro Yasuda absorbed the Tokyo Fire Insurance Company into the Yasuda zaibatsu. Later, in 1944, Tokyo Fire Insurance, Imperial Marine Insurance, and First Engine & Boiler Insurance merged to become the Yasuda Fire & Marine Insurance Company (安田火災海上保険).

Japan ⁱ/dʒəˈpæn/ (Japanese: 日本 Nihon or Nippon; formally 日本国  Nippon-koku or Nihon-koku, literally the State of Japan) is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south. The characters that make up Japan's name mean "sun-origin", which is why Japan is sometimes referred to as the "Land of the Rising Sun".

Japan is an archipelago of 6,852 islands. The four largest islands are Honshū, Hokkaidō, Kyūshū and Shikoku, together accounting for ninety-seven percent of Japan's land area. Japan has the world's tenth-largest population, with over 127 million people. The Greater Tokyo Area, which includes the de facto capital city of Tokyo and several surrounding prefectures, is the largest metropolitan area in the world, with over 30 million residents.

Archaeological research indicates that people lived in Japan as early as the Upper Paleolithic period. The first written mention of Japan is in Chinese history texts from the 1st century AD. Influence from other nations followed by long periods of isolation has characterized Japan's history. In the late 19th and early 20th centuries, victory in the First Sino-Japanese War, the Russo-Japanese War and World War I allowed Japan to expand its empire during a period of increasing militarism. The Second Sino-Japanese War of 1937 expanded into part of World War II in 1941, which came to an end in 1945 following the atomic bombings of Hiroshima and Nagasaki. Since adopting its revised constitution in 1947, Japan has maintained a unitary constitutional monarchy with an emperor and an elected parliament called the Diet.