During the Edo period, the Ōbakusan Manpuku-ji 黄檗山萬福寺 operated under two sets of by-laws, both of which were based on the Ōbaku Shingi 黄檗清規 （Ōbaku code of conduct）, more commonly known as the Dai Shingi 大清規 （Great code of conduct）. The two sets of by-laws were: 1） the Ōbaku Sannai Shingi 黄檗山内清規 （Code of conduct for the Ōbaku temple community）, usually referred to as the Shō Shingi 小清規 （Small code of conduct; later enlarged and revised as the Ōbakusan Shō Shingi 黄檗山小清規）; and 2） the various Suchi 須知. The former supplemented the Great code of conduct, giving detailed regulations and instructions for the daily life and rituals of the temple, while the latter provided information necessary for the various temple positions. The present study shows that ceremonies such as the Jizō Tanshin 地蔵誕辰 （Kṣitigarbha’s birthday） were subsequently added to the by-laws and that changes were made to the Daruma-ki 達磨忌 ceremony （the ceremony honoring Bodhidharma）, facts that were revealed through an examination of the chief priests’ New Year’s greetings to the community. In addition, I hypothesize that the Ōbaku Sannai Shingi was compiled in 1700 by the Ōbaku monk Reichu Genkan 嶺冲元漢 （?–1740）.