The first half of the Lotus Sutra (Shakumon) expounds the teaching of the One Vehicle. The several schools of Buddhism, which are divided roughly into three types (Sravaka-Vehicle, Pratyekabuddha-Vehicle, and Bodhisattva-Vehicle), are unified in the one single teaching of the One Vehicle. Since the number three represents all the various Buddhist Teachings, “three” here implies “many” or “all.”