Shinobu ORIGUCHI perceived the period which is from autumn through the next spring as the period that all souls including the ones of human beings are renewed by holding the ceremony of tamafuri (shaking of souls).
折口信夫は秋から翌春にかけてのこの時期を魂振を行って人間を含めた全ての魂が更新されるための時期として捉えた。