Itō Line

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Itō Line
Izukyu Resort21 IzuTaga.jpg
Izu Kyuko Railway 2100 series "Resort21" train at Izu-Taga Station, March 2010
Type Passenger
Termini Atami
Opening 1935
Operator(s) JR East
Line length 16.9 km
Track gauge 1,067 mm (3 ft 6 in)
Ito line map
Itō Line
LeftTōkaidō Main LineRight
Tokyo Station
Tōkaidō Main Line
Tōkaidō Shinkansen
0.0 Atami Station
1.2 Kinomiya Station
Fudō Tunnel 1795m
6.0 Izu-Taga Station
8.7 Ajiro Station
Shin-Usami Tunnel 2941m
13.0 Usami Station
16.9 Itō Station
Izu Kyūkō Line
Izukyū Shimoda Station

The Itō Line (伊東線 Itō-sen?) is a railway line owned by the East Japan Railway Company which connects Atami and Itō Stations, along the east coast of Izu Peninsula in Shizuoka Prefecture, Japan. From Itō, the line continues south to Shimoda under the privately owned and operated Izu Kyūkō Line.

Station list[edit]

Japanese Distance from
Atami (km)
Transfers Location
(Through service for Tokyo via Tōkaidō Main Line)
Atami 熱海 0 Tōkaidō Shinkansen
Tōkaidō Main Line
Atami Shizuoka
Kinomiya 来宮 1.2
Izu-Taga 伊豆多賀 6.0
Ajiro 網代 8.7
Usami 宇佐美 13.0 Itō
Itō 伊東 16.9 Izukyu Izu Kyūkō Line (through service)
(Through service for Izukyū Shimoda via Izu Kyūkō Line)


Initial plans called for the Japanese National Railways (JNR) to build a spur line linking Atami on the Tōkaidō Main Line with Shimoda. However, funding was limited in the 1930s due to a combination of a tight fiscal policy under Prime Minister Osachi Hamaguchi during the Great Depression, and a number of technical issues, The projected route of the Itō line along the mountainous east coast of the Izu Peninsula required numerous tunnels and bridges. Workers digging a tunnel near Usami encountered problems with underground hot springs, similar to that experienced in the construction of the Tanna Tunnel, which had recently been completed years later than originally projected and far over budget.

On March 30, 1935, the initial 8.7 kilometer section of the Itō Line linking Atami with Ajiro was opened. The second (8.3 kilometer) section from Ajiro to Itō was completed on December 15, 1938. Further work was delayed, and then canceled due to the outbreak of World War II.

Construction was not resumed until 1961, when the private-sector Tokyu Corporation acquired the rights to complete the line from Itō to Shimoda and established the Izukyū Corporation to manage construction and operations of this section.