The Japan Railways Keihin-Tohoku line takes about 40 minutes from Tokyo to Sakuragi-cho Station in Yokohama; the faster shinkansen leaves you off at Shin-Yokohama, on the outskirts of the city.
It takes 40 minutes to go from Tokyo to Yokohama.
The core issue is whether it is ethical for Americans to conduct Third World studies seeking therapies cheaper and perhaps inferior to our own.