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Domo arigato.
  • Okutama Mountains Great Hiking Spot

  • Okutama Hiking Tour Along The Tamagawa River

  • Okutama Mountains Hiking Path

  • Okutama Mountains Hiking Path

  • Okutama Town And Tamagawa River

  • Ogouchi Dam Near Okutama

  • Hiking Tour Around The Ogouchi Dam

  • Lake Okutama-ko Ogouchi Dam

  • Lake Okutama-ko Ogouchi Dam

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Facts & Figures

Lake Okutama-ko is an important water reservoir for the city Tokyo. This artifical lake was created through the Ogouchi Dam (height 149m, length 353m) and covers an area of 263.8 square kilometre.


It took 20 years till 1957 to finish the construction of the Ogouchi Dam.

Location Show map

Lake Okutama-ko is located in the western part of the Tokyo Nishitama District.

How to get to Lake Okutama?

  • 75min from Tokyo (Shinjuku) to Ome Station by JR Chuo Line and
  • 45min from Ome Station to Okutama Station by JR Ome Line
  • 20min from Okutama Station to Okutama-ko stop by Kosuge bus

Sightseeing spots


Ogouchi-jinja Shrine - enshrines nine relocated shrines at the shore line of lake Okutama-ko

Tamagawa River - follow the Otama Walking Trail (length 8km) from Okutama Station to Kori Station along the river

Mt. Mitake - a popular hiking destination near Okutama, the mountain is 929m high with the Musashi-Mitake Shrine on top

Festival & Events (dates can change without notice)


Cherry Blossom (mid-April)
You will find at the northern shore of lake Okutama-ko 10 000 cherry trees. It is a great sight during Hanami (cherry blossom).