Most Japanese people do not exclusively identify themselves as adherents of a single religion; rather, they incorporate elements of various religions in a syncretic fashion known as Shinbutsu shūgō (神仏習合, amalgamation of kami and buddhas^?). Shinbutsu Shūgō officially ended with the Shinto and Buddhism Separation Order of 1886, but continues in practice. Shinto and Japanese Buddhism are therefore best understood not as two completely separate and competing faiths, but rather as a single, rather complex religious system.Christianity also has an influence on mainstream culture.

Japan enjoys full religious freedom and minority religions such as Christianity, Islam, Hinduism and Sikhism are practiced. Figures that state 84% to 96% of Japanese adhere to Shinto and Buddhism are not based on self-identification but come primarily from birth records, following a longstanding practice of officially associating a family line with a local Buddhist temple or Shinto shrine. About 70% of Japanese profess no religious membership, according to Johnstone (1993:323), 84% of the Japanese claim no personal religion. In census questionnaires, less than 15% reported any formal religious affiliation by 2000. And according to Demerath (2001:138), 64% do not believe in God, and 55% do not believe in Buddha. According to Edwin Reischauer, and Marius Jansen, some 70–80% of the Japanese regularly tell pollsters they do not consider themselves believers in any religion. Japanese streets are decorated on Tanabata, Obon and Christmas.

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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.