Buddhism and Shinto.
The Shinto Philosophy that influenced personal behavior In medieval Japan is the Warrior Code of Loyalty, duty, and honor called "Bushido". It developed as the code for the Samurai class who believed in Death over surrender. It would later influence the KamiKaze Pilots of World War 2
Japan.
Shinto religion is practiced in Japan.
There are about 17.822 million people who practice the Shinto religion. Most of them reside in Japan, or come from Japanese background. Asia has the largest population of the Shinto religion. The religion was founded about 2,500 years go. Approximately 0.2% of the world is Shinto.
The two main religions in Japan are Buddhism and Shinto, but I think one could fairly categorize the Japanese, as a whole, as 'nonreligious.' Buddhism and Shinto have influenced cultural aspects of Japan greatly, but a majority of Japanese identify as atheist or agnostic.
Japan
Shinto, as Japan's indigenous spirituality, profoundly influences various aspects of Japanese culture, including festivals (matsuri), architecture, and rituals. Many traditional practices, such as the celebration of seasonal changes and agricultural rites, are rooted in Shinto beliefs. Additionally, Shinto aesthetics are evident in art and garden design, emphasizing harmony with nature. The reverence for kami (spirits) also fosters a deep respect for the natural world, which is reflected in Japanese philosophy and lifestyle.
Buddhism from China eventually influenced Shinto religion within Japan. However Japanese till this day are mostly not Buddhists/Taoists. They use a mixture of both Buddhist and Shinto beliefs.
The vast majority of Shinto is Japan, and is the original country of Shinto in the world
Shinto hasn't really spread. Over the years, Shinto has been practiced almost exclusively in Japan. Most people who practice Shinto in other parts of the world are Japanese in heritage.
Shinto