Nippon Life Insurance Company (日本生命保険相互会社, Nihon Seimei Hoken Sōgo-gaisha), also known as Nissay (ニッセイ, Nissei) or Nihon Seimei (日本生命) is the largest Japanese life insurance company by revenue. The company was founded in 1889 as the Nippon Life Assurance Co., Inc. In structure it is a mutual company. It first paid policyholder dividends in 1898.