From AikiWiki - AikiWeb Aikido Information
[edit] Omoto Kyo: 大本教
One of the so-called "new-religions" of Japan. OMOTOKYO is a syncretic amalgam of Shintoism, Neo-Shinto mysticism, Christianity, and Japanese folk religion. The founder of aikido was a devotee of OMOTOKYO, and incorporated some elements from it into his aikido practice. The founder insisted, however, that one need not be a devotee of OMOTOKYO in order to study aikido or to comprehend aikido's purpose.