According to this same postscript, Unkei vowed to have the Lotus Sutra transcribed between 1175 and 1177 (while in his 20s) and the task was begun several years later in 1183 after receiving the assistance of Akomaru.
同奥書によると、運慶は安元年間（1175-1177年、運慶20歳代）に法華経書写を発願、数年後の寿永2年（1183年）に至って、阿古丸なる女性の援助を得て書写が行われることになった。