After the seclusion of Nichiren Daishonin, priest Nikko labored for missions of Fuji region. More than ten priests were converted at Jisshoji Temple, Shijyukuin Temple and Ryusenji Temple by the shakubuku of Nikko because they had been disappointed by the close relationship between political and religious circles. And people gradually welcomed Nichire Shoshu because they had also suspected the decadence of these temples.
The temples took preventive measures against Nichiren Shoshu to kick out converts. However the effect was soon canceled since Nichiren Daishonin sent Nikou and other three priests as reinforcements. Then, Gyochi, the chief priest of Ryusen-ji, implored Heino Saemon to remove Nichiren Shoshu, and they formed a conspiracy.
On Sep. 21 in the second year of Koan (1279), priest Nisshu and believers were harvesting their rice. Suddenly, an army surounded them and restrained on suspicion of theft of them. An arbitrary trial was performed in the private yard of Heino Saemon, and his conclusion was "Nam-Amida-Butsu or sword". He strongly believed that it was very easy thing to make farmers reconvert by force. However, no one threw away the Lotus Sutra, and they started chanting.
Heino Saemon slowly threw up his sword over the head, "Nam-myoho-renge-kyo, Nam-myoho-renge-kyo", and quickly swing it down to the neck of Jinshiro, "Nam-myoho-renge-kyo, Nam-myoho-renge-kyo," again to Yagoro, "Nam-myoho-renge-kyo, Nam-myoho-renge-kyo," and again to Yarokuro only to find the voice of chanting became stronger to stronger. He dropped the sword which had cut off three heads, and was petrified cavantly.
"Nam-myoho-renge-kyo, Nam-myoho-renge-kyo, Nam-myoho-renge-kyo."