Japanese new religions are new religious movements established in Japan. In Japanese, they are called shinshūkyō (新宗教) or shinkō shūkyō (新興宗教). Japanese scholars classify all religious organizations founded since the middle of the 19th century as "new religions"; thus, the term refers to a great diversity and number of organizations. Most came into being in the mid-to-late twentieth century and are influenced by much older traditional religions including Buddhism and Shinto. Foreign influences include Christianity, the Bible, and the writings of Nostradamus.

A new religious movement (NRM), also known as alternative spirituality or a new religion, is a religious or spiritual group that has modern origins and is peripheral to its society's dominant religious culture. NRMs can be novel in origin or they can be part of a wider religion, in which case they are distinct from pre-existing denominations. Some NRMs deal with the challenges that the modernizing world poses to them by embracing individualism, while other NRMs deal with them by embracing tightly knit collective means. Scholars have estimated that NRMs number in the tens of thousands worldwide. Most NRMs only have a few members, some of them have thousands of members, and a few of them have more than a million members.