The Senseki Line is a 49.0 km long line connecting Sendai City in the central part of Miyagi Prefecture and Ishinomaki City in the northeast, and is the only DC electrified line in the Tohoku region. Like the Saikyo Line, ATACS is used in some sections (Aobadori Station to Higashi-Shiogama Station).
In the Great East Japan Earthquake of March 11, 2011, the Senseki Line, which runs along the coast, was severely damaged by the earthquake and tsunami, and the entire line was shut down.
The line between Rikuzen-Otsuka and Rikuzen-Ono stations, located in low-lying areas and particularly heavily damaged, was relocated to higher ground inland, and resumed full service on May 30, 2015, four years after the line was closed.
In conjunction with the restoration of all lines, a connecting line was established between Matsushimakaigan Station and Takagimachi Station to connect from the Tohoku Main Line, and the "Senseki Tohoku Line" began direct service.
The Senseki Tohoku Line operates between Takagimachi Station and Ishinomaki Station, and HB-E210 series diesel trains also operate on the line.
The first half of the line (from Aobadori Station to Hon-Shiogama Station) runs through a bedroom town of Sendai, the middle part (from Hon-Shiogama Station to Tona Station) runs along Matsushima Bay with Matsushima, one of the three most scenic spots in Japan, at its side, and the latter half (from Tona to Ishinomaki Station) runs through a rural landscape.

Highlights

• Running of underground section / Aobadori Station - Rikuzen-Haranomachi Station
  
• Senseki Line cars belonging to the rail yard (Sendai Rolling Stock Center Miyagino Depot)/Kozurushinden Station - Fukudamachi Station
  
• Shiogama Port seen on the right after exiting Hon-Shiogama Station / Hon-Shiogama Station - Higashi-Shiogama Station
  
• Switching between ATACS and ATS-Ps /Higashi-Shiogama Station - Rikuzen-Hamada Station
  
• Gateway to Matsushima, one of the three most scenic spots in Japan/Matsushimakaigan Station
  
• Connecting line from Tohoku Main Line to Senseki Line (Senseki Tohoku Line)/Matsushimakaigan Station - Takagimachi Station
  
• Running along the seashore along Matsushima Bay/Rikuzen-Tomiyama Station - Tona Station
  
• Section relocated to higher ground inland/Rikuzen-Otsuka Station - Rikuzen-Ono Station
  
• Going down the elevated track toward the rice paddy area/Nobiru Station - Rikuzen-Ono Station
  
• The freight line from Ishinomaki-ko Station joins the line/Rikuzen-Yamashita Station

Route Information

• Section: Senseki Line Aobadori→Ishinomaki Down
  
• Total length: 49.0 km
  
• Number of Stations: 32
  
• Security equipment: ATACS/ATS-Ps

Train schedules that can be operated

• Train Number：1221S
  
• Type/Destination: Local Train to Ishinomaki
  
• Station section that can be operated: Aobadori to Ishinomaki
  
• Type of train: Series 205-3100, 4 cars
  

• Responsible for real voice train announcements: JR Three Musketeers (experienced conductors)

• Train Number：763S

• Type/Destination: Local Train to Tagajo

• Station section that can be operated: Aobadori to Tagajo

• Type of train: Series 205-3100, 4 cars

• Responsible for real voice train announcements: Miyagino train crew depot

• Train Number：781S

• Type/Destination: Local Train to Matsushimakaigan

• Station section that can be operated: Aobadori to Matsushimakaigan

• Type of train: Series 205-3100, 4 cars

• Responsible for real voice train announcements: Miyagino train crew depot