Saicho, who is considered to have been one of the most active Buddhist priests in the early Heian period along with Kukai, also planned to build six pagodas in various parts of Japan in order to house 1000 copies of the Lotus Sutra.
空海とともに平安時代初期の仏教界で活動した最澄は法華経千部を安置する塔を日本各地の6か所に建立することを計画した。