Tobu Railway 50000 Series EMU
The 50000 Series EMU is operated by the Tobu Railway company and can be found running throuogh various parts of Tokyo. Specifically you can find these trains on the Tojo Line, Skytree Line, and the Isesaki Line. Also due to the through running nature of Tokyo’s railway companies these trains can also be spotted on the Tokyo Metro’s Hanzomon Line and Fukutoshin/Yurakucho Lines as well as on the Tokyu Den-en-toshi line.