Summary: How much medicine can I bring into Japan? It also stimulates vitamin C levels to help create collagen for healthy skin. While numerous medications are easily available in Western countries without a prescription, Japan takes a much harder line on certain ingredients. Which prescription medicines are outright prohibited? The safety and efficacy of Viagra has been approved in more than countries and prescribed to more than 20 million patients around the world.There is no concept that you purchase that over the counter under Japanese regulation. So that, you have to go to clinic or hospital but where? In Japan, there are two types of . All Viagras which we prescribe are manufactured by Pfizer Japan and transported by credible licensed distributors. There is no possibility of counterfeit Viagra. Features of . Answer 1 of 4: Can you buy viagra over the counter in tokyo?: Get Tokyo travel advice on Tripadvisor’s Tokyo travel forum.