R
Rakutenchi Cable (Common name. Okamoto MFG) Rifu Line (Common name. East Japan Railway Company) Rikuu-Sai Line (East Japan Railway Company) Rikuu-Tō Line (East Japan Railway Company) Rinkai Fukutoshin Line (Former name. Tokyo Waterfront Area Rapid Transit) Rinkai Line (Tokyo Waterfront Area Rapid Transit) Rinkai Main Line (Freight. Keiyo Rinkai Railway) Rinkai Main Line (Freight. Sendai Rinkai Railway) Rinkan Sun Line (Nickname. Nankai Electric Railway) Rinkō Line (Freight. Taiheiyo Coal Services and Transportation) Rokkō Cable Line (Rokko Maya Railway) Rokkō Island Line (Kobe New Transit) Rumoi Main Line (Hokkaido Railway Company) Ryōmō Line (East Japan Railway Company) Ryūgasaki Line (Kanto Railway)
S
Sagami Line (East Japan Railway Company) Sagamihara Line (Keio Electric Railway) Sagano Line (Nickname. West Japan Railway Company) Sagano Scenic Line (Sagano Scenic Railway) Saikyō Line (Nickname. East Japan Railway Company) Sai-no-Kuni Stadium Line (Nickname. Saitama Railway) Saitama Rapid Railway Line (Saitama Railway) Saito Line (Nickname. Osaka Rapid Railway) Saitozaki Line (Common name. Kyushu Railway Company) Sakai Line (West Japan Railway Company) Sakaisuji Line (Osaka Municipal Transportation Bureau) Sakamoto Cable (Common name. Hieizan Railway) Sakuradōri Line (Common name. Transportation Bureau City of Nagoya) Sakurai Line (West Japan Railway Company) Sakurajima Line (West Japan Railway Company) Sakuramachi Branch Line (Nagasaki Electric Tramway) Sambashi Line (Tosaden Kōtsū) Sanda Line (Kobe Electric Railway) Samatsu Line (Common name. East Japan Railway Company) Sangi Line (Sangi Railway) Sangū Line (Central Japan Railway Company) San'in Main Line (West Japan Railway Company) Sankō Line (West Japan Railway Company) Sano Line (Tobu Railway) San'yō Main Line (West Japan Railway Company, Kyushu Railway Company) San'yō Shinkansen (West Japan Railway Company) Sasaguri Line (Kyushu Railway Company) Sasebo Line (Kyushu Railway Company) Sassho Line (Hokkaido Railway Company) Sawara Line (Common name. Hokkaido Railway Company) Sayama Line (Seibu Railway) Seaside Line (Nickname. Yokohama New Transit) Seibu Chichibu Line (Seibu Railway) Seibu Yūrakuchō Line (Seibu Railway) Seibuen Line (Seibu Railway) Seikan Tunnel Tappi Shakō Line (Seikan Tunnel Museum) Seikibashi Line (Okayama Electric Tramway) Seishin Extended Line (Kobe Municipal Transportation Bureau) Seishin Line (Kobe Municipal Transportation Bureau) Seishin-Yamate Line (Group name. Comprising the Seishin Line, Seishin Extended Line and Yamate Line. Kobe Municipal Transportation Bureau) Sekihoku Main Line (Hokkaido Railway Company) Sekishō Line (Hokkaido Railway Company) Semboku Rapid Railway Line (Semboku Rapid Railway Co., Ltd.) Semmō Main Line (Hokkaido Railway Company) Sendai Airport Access Line (Nickname. East Japan Railway Company. Sendai Airport Transit) Sendai Airport Line (Translation. Sendai Airport Transit) Sendai Futō Line (Freight. Sendai Rinkai Railway) Sendai Kūkō Line (Sendai Airport Transit) Sendai Nishikō Line (Freight. Sendai Rinkai Railway) Sennichimae Line (Osaka Municipal Transportation Bureau) Senri Line (Hankyu Corporation) Senseki Line (East Japan Railway Company) Senzaki Branch Line (Common name. West Japan Railway Company) Senzan Line (East Japan Railway Company) Setagaya Line (Tokyo Kyuko Electric Railway) Seto Line (Nagoya Railroad) Seto-Ōhashi Line (Nickname. West Japan Railway Company, Shikoku Railway Company) Setouchi Sazanami Line (Nickname. West Japan Railway Company) Shibayama Railway Line (Shibayama Railway) Shido Line (Takamatsu-Kotohira Electric Railroad) Shigaraki Line (Shigaraki Kōgen Railway) Shigi Line (Kintetsu Railway) Shima Line (Kintetsu Railway) Shimabara Railway Line (Shimabara Railway) Shimanto Green Line (Nickname. Shikoku Railway Company) Shimminato Line (Freight. Japan Freight Railway Company) Shimminatokō Line (Man'yo Line) Shinano Railway Line (Shinano Railway) Shin'etsu Main Line (East Japan Railway Company) Shinjuku Line (Seibu Railway) Shinjuku Line (Tokyo Metropolitan Bureau of Transportation) Shinonoi Line (East Japan Railway Company) Shiomibashi Line (Common name. Nankai Electric Railway) Shiomichō Line (Freight. Nagoya Rinkai Railway) Shizuoka Shimizu Line (Shizuoka Railway) Shōnan Monorail (Common name. Shonan Monorail) Shōnan-Shinjuku Line (Nickname. East Japan Railway Company) Shōwamachi Line (Freight. Nagoya Rinkai Railway) Skyrail Midorizaka Line (Nickname. Skyrail Service) Sōbu Line (Rapid) (Common name. East Japan Railway Company) Sōbu Main Line (East Japan Railway Company) Sōbu Nagareyama Line (Sobu Nagareyama Electric Railway) Sōtetsu Main Line (Sagami Railway) Sotobō Line (East Japan Railway Company) South Line (Translation. Freight.