For those already within Kyoto, the subway is a convenient way to get around the city. The Kyoto Municipal Transportation Bureau is in charge of operating the Kyoto Municipal Highway made up of two lines: the Karasuma and Tozai Lines. Travelers to Kyoto should keep in mind that the Karasuma Line is coded green and have stations labeled with numbers after a “K.” All stations are within the city proper so theres sure to be one conveniently located close to your destination. As for the Tozai Line, it is colored vermillion and has stations labeled with numbers after a “T.” The line runs southeast of Kyoto then east to west, running through the downtown area under the three east-west streets of Sanjo, Oike, and Oshikoji. All of the Tozai Lines’ stations are also located within the city proper except for Rokujizo.
I learned this from a Kyoto travel guide: Aside from the subway system, Kyoto also has an extensive bus network, with both the government and private companies operating bus lines. Many tourists take the bus, either joining locals commuting on public buses or taking tour buses. For the benefit of travelers from all over the world, buses in Kyoto have announcements in English and electric signs for stops written out in Latin alphabet. Most of the city buses will have fixed rates but there are bus and train passes available for more convenient traveling. Kyoto has a bus information center outside of the central station to take care of any concerns about passes and tickets so don’t forget to keep that in mind.