Shimōsa (train)
| JR East E231-0 series EMU set MU35 on a Shimōsa service | |
| Overview | |
|---|---|
| Service type | Local | 
| Status | Operating | 
| Locale | Chiba Prefecture and Saitama Prefecture, Japan | 
| Predecessor | None | 
| First service | 4 December 2010 | 
| Last service | Unknown | 
| Successor | Unknown | 
| Current operator(s) | JR East | 
| Former operator(s) | None | 
| Ridership | Unknown | 
| Route | |
| Termini | Kaihimmakuhari/Shin-Narashino/Nishi-Funabashi Ōmiya | 
| Line(s) used | Keiyō Line, Musashino Line, Tōhoku Main Line | 
| On-board services | |
| Class(es) | Standard class only | 
| Seating arrangements | Longitudinal | 
| Catering facilities | None | 
| Other facilities | No toilets | 
| Technical | |
| Rolling stock | 209-500/E231-0/E231-900 series EMUs | 
| Track gauge | 1,067 mm (3 ft 6 in) | 
| Electrification | 1,500 V DC overhead | 
The Shimōsa (しもうさ) is an all-stations train service in Japan operated by the East Japan Railway Company (JR East) between Kaihimmakuhari in the Chiba Prefecture and Ōmiya in the Saitama Prefecture. The Shimosa looks like the Musashino train because they use the same train stock. However, there are some differences between these two services, the Musashino train goes from Hachioji or Fuchu-hommachi whereas the Shimosa goes from Shin-Narashino or Kaihimmakuhari.