[1] Higuchi wrote more than 450 medical papers on various aspects of dermatology, including mycology and syphilis.
He accepted many congresses,[clarification needed] on topics including dermatology, allergy, mycology and hospital management.
In many examinations for syphilis at his time, the reactions had remained positive, even after satisfactory treatment.
In 1968 there occurred an outbreak of yushō disease, which later proved to be caused by contamination of rice bran oil with PCBs.
A team was organized and produced the book PCB poisoning and pollution under Higuchi's editorship.