The east pagoda is such a unique pagoda as the first story has three intervals (in the sense that there are four pillars and three intervals between pillars), the second and third stories have two intervals (in the architecture of temples and shrines in Japan it is unusual to have even-numbered intervals between pillars and a pillar in the center.
東塔は初重が通常どおり3間（柱が一辺に4本立ち、柱間が3つあるという意味）であるのに対し、二重・三重を2間とする特異な塔である（日本の社寺建築では、柱間を偶数として、中央に柱が来るのは異例）。