The Mahikari movement (Japanese: 真光) is a Japanese new religious movement (shinshūkyō) that was founded in 1959 by Yoshikazu Okada (岡田 良一) (1901–1974). The word "Mahikari" means "True (真, ma) Light (光, hikari)" in Japanese. The movement currently consists of various splinter organizations; the largest ones are currently World Divine Light (世界真光文明教団) in Izu and Sukyo Mahikari (崇教真光) in Takayama. Both of these organizations refer to their headquarters as Suza (主座) ("God's throne"), since they are the shrines for the supreme Su-god (ス神, su-kami). Both organizations also refer to their spiritual leader as Oshienushi or Oshienushi-sama (教え主[様]).

The original Mahikari organization was founded by Kōtama Okada (born Yoshikazu Okada) in 1959. The organization was originally named L. H. Yokoshi no Tomo (陽光子友乃会, Yokoshi Tomo no Kai, "Lucky, Healthy, Association of Bright / Positive People").

Kōtama Okada claimed that his role involved spreading God's Light and the universal principles to humanity.

The art of True Light is a practice meant to purify one's spiritual aspect as an expedient toward attaining happiness. Radiating Light from the palm of the hand is a method of purification that cleanses the spirit, mind and body, and is said to help open the way to resolving all manner of problems. Okada spent much of his time in the early days of the organization giving Light to people throughout Japan. In 1973, he visited Europe, and the art of True Light started spreading throughout the world.

Kōtama Okada believed that if people lived in accordance with "universal principles," they would cultivate their spirituality, and naturally come to use science and technology that was integrated with an understanding of spirituality, to find solutions to pressing issues facing humanity. Mahikari encourages people to incorporate these universal or divine principles in their daily life by practicing virtues such as altruistic love, gratitude, humility and acceptance of the will of God. Kōtama Okada proclaimed the fundamental tenet of the organization, "The origin of the earth is one, the origin of the universe is one, the origin of humankind is one, and the origin of all religions is one." He emphasized that all human beings share a common origin and that people should work together to create a peaceful world of love and harmony, transcending the barriers of religious denomination, nationality, ideology, and so on.

Okada claimed that God has a plan ("the divine plan"), and in preparation for a heaven-like civilization on earth, the world was entering a time of great upheaval. Okada said that an increase in what he called the spiritual energy of fire would result in abnormal weather phenomena such as flooding, fires, and water shortages, and encouraged people to transition from a way of life based on excessive materialism to a sustainable way of life in harmony with the environment and universal principles.

The fundamental teachings of Mahikari appear in The Holy Words (御聖言, Goseigen) and The Yōkōshi Prayer Book (陽光子祈言集, Yōkōshi Norigoto-shū) (lit. 'Prayerbook of the Sunshine Children'). Other books Mahikari doctrinal books include Mioshie-shū (御教え集, "Holy Teachings" and Mahikari shokyū kenshū sankō-sho (真光初級研修参考書, "Mahikari Primary Training Reference Book").

Following the passing of Kōtama Okada on June 13, 1974, Mahikari split into several different organizations.