Although most places of interest in the downtown area are within walking distance, the Loople Sendai bus, operated by the City Transit Authority, will take you to the famous places in Central Sendai with ease.
A one-day ticket costing 600 yen allows you to use the bus as much as you like within one day, and it offers a easiest way to enjoy the various attractions in Sendai. Among its stops are the Site of Sendai Castle, Sendai City Museum, Miyagi Museum of Art, and Tohoku University's Museum of Natural History (Rigakubu-Mae).