TCA acid, cryotherapy, aldara
cream, surgical removal) instead of a powdered drink. Japan is an advanced country, and even if you can't get the cream, there are other successful methods. In the meanwhile, don't cut off the warts yourself. There has to be a doctor there that will treat them in an effective manner. Presence of warts definitely means you're contagious and can transmit HPV. It is safe to assume you are contagious until you have been totally wart free for 6 months or more.