We need to get to the root of the problem.
The origin of this custom lies in ancient Shinto.
Ōmoto (religion)
Only when written 大本
Refers specifically to Ōmoto, a Japanese new religion founded in the late 19th century. Often seen in the full name 大本教.
See also: 大本教
Ōmoto is a religion that began in the Meiji period.
Standard kanji spelling for the general meaning 'root, origin'. Also used for the Ōmoto religion.
Search-only variant; not a standard spelling for this word.
Search-only mixed kana-kanji form.
Compound of 大 (ō, 'big, great') and 本 (moto, 'origin, root'). The reading おおもと is a straightforward combination of the kun'yomi readings of the two kanji.