Yes, you can charge your phone on almost all Shinkansen (bullet trains) in Japan, but the availability of outlets depends on the model of the train and your class of service. On the newer N700S (Supreme) models, which are increasingly common on the Tokaido and Sanyo lines as of 2026, every single seat in both Ordinary and Green Class is equipped with an individual power outlet located in the armrest. On older N700A models, outlets are typically only found at the window seats and the end-row seats of Ordinary cars, though Green Class features them at every seat. For the E5, E6, and E7 series running on the Tohoku and Hokuriku lines, most modern configurations provide outlets at every seat. It is important to note that the voltage in Japan is 100V, and the outlets accept the two-prong Type A plug. While a standard USB block works fine, you should ensure your charger is compatible with the local voltage. If you are on an older train with limited outlets, bringing a small portable power bank is a wise backup strategy for a long journey.