INPEX CORPORATION (INPEX) has made a final
investment decision on the fifth stage extension of the “Shin Tokyo Line” natural gas trunk
pipeline to further secure a stable natural gas supply to the northern Kanto region of Japan,
where natural gas demand is expected to grow steadily.
The fifth stage extension of the Shin Tokyo Line, which currently extends approximately 213
kilometers from Joetsu City in Niigata Prefecture to Fujioka City in Gunma Prefecture, will
lengthen the pipeline by approximately 16 kilometers from Fujioka City in the direction of
Tokyo. The extension will also enhance supply capacity by extending the double tracking
sector also served by the “Tokyo Line.” Following the extension, the Shin Tokyo Line will
extend 229 kilometers to Honjo City in Saitama Prefecture where it will connect to the Tokyo
Line, which largely runs parallel to the Shin Tokyo Line.
On September 1, 2021, INPEX will set up a Pipeline Construction Office in Honjo City from
where it will manage construction work associated with the extension.
Separately, INPEX has decided to forgo the second stage double tracking of the “Ryomo
Line” over a six-kilometer stretch between Kamisato Town and Honjo City both in Saitama
Prefecture, for which it has conducted a feasibility study. This decision is based on INPEX’s
expectation that stable gas supply can be secured. The Ryomo Line currently extends
approximately 89 kilometers from Honjo City to Tatebayashi City in Gunma Prefecture and to
Sano City in Tochigi Prefecture.
INPEX will contribute to stable energy supply, environmental protection and economic and
social development by stably supplying diverse energy in a cleaner way to customers in
Japan and around the world, towards the realization of a net zero carbon society by 2050.
Overview of the fifth stage extension of the Shin Tokyo Line
- Route: Central Fujioka City, Gunma Prefecture to central Honjo City, Saitama Prefecture
- Length: Approximately 16 kilometers
- Specifications: 7.0 megapascals of design pressure; 508-millimeter (20-inch) diameter
- Construction period: Start-up in 2022; scheduled completion in 2024