Kinen (incantation) is a traditional magic (spell) in Japan. In Shinto, Okuninushi no kami and Sukunabikona no kami are regarded as the soshin (ancestor honored as god) of Kinen.
Hojutsu kosetsu, written by Nobutomo BAN, a scholar of Japanese classical literature who lived in the Edo period, describes as follows:
Majinai refers to the magic of pronouncing a curse on the original cause in order to bring down harmful results; Noroi (curse) is concerned with evil omen only whereas Majinai includes both good fortune and evil omen.
The above description also mentions that the original cause is called 'Majimono'.