Oedo Rangakuji Kotohajime

is a Japanese light novel series written by Hiroyuki Onuma and Junichi Watanabe, with illustrations by Hirofumi Nakamura. The series began publication on October 10, 1993 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"There is a ghost cat in the Tanuma mansion!" As expected, Hiraga Gennai also stared at Nakagawa Jun'an with a dismayed face. Jun'an, who is the same orchid doctor as Genpaku Sugita and has a deep knowledge of medicinal herbs, cannot bring such a story just by rumors. Gennai, who was planning and operating the "Toto Yakuhinkai", a national exposition of medicinal herbs, was running around Edo with Genpaku and Junan for the 5th event. There is this story. At Jun-an, a man who was stuffed with a sluggish Tanuma mansion left the mystery that lasted for a month at the Oku-goten and the death of his wife. And he was offered to get rid of the ghost cat. Gennai says to Genpaku, who says, "Ask a Dutch doctor for such a thing." "If you really are, I'll take a closer look and put it in my book. This is my basic stance!" Young Gennai set out to get rid of the ghost cats with his unique friends. Oedo adventure activity, appeared here.