When Shotaro Kaga lived in Oyamazaki Villa (the current main building), the villa was known as a center for orchid cultivation. “Rankafu” illustrates the orchids cultivated in the villa through 83 woodblock prints, 14 color illustrations, and 7 single color photo images—a total of 104 pieces. The woodblock prints employ the ukiyoe technique, and its beautiful coloring and technique are highly regarded both aesthetically and academically.