The second theory says that they were normally buried and, on a ceremonial occasion, dug out and used, but later, less often used due to changes in the ceremonial or religious style, they were left for all in the ground (Seicho MATSUMOTO and others).
平時は地中に埋納し、祭儀等の必要な時に掘り出して使用したが、祭儀方式や信仰の変化により使われなくなり、やがて埋納されたまま忘れ去られたとする説（松本清張等）。