From the illuminating site Japanese Mathematics in the Edo period (HERE).
Shinpen Jinkoki is a three-volume book edited by Yoshida Mitsuyoshi (1598-1673). The book underwent many revisions in Mitsuyoshi's lifetime. The version published in the eleventh year of the Kan'ei era (1641) became the most widespread, and the last version Yoshida himself published was the Idai book, in the eighteenth year of the Kan'ei era (1634).
The image below is from a 1689 edition of Shinpen Jinkoki.