Aulacaspis yasumatsui is a scale insect and a pest towards C. revoluta, able to destroy the plant.
In November, 1956, he studied a mass Cycas revoluta poisoning, the first in the world, which occurred because of starvation.
As well as the palms, these include a miniature oriental landscape featuring Styphnolobium japonicum “Pendulum” and Prunus, and a large Cycas revoluta.