Infrastructure Tour

Chapter 4

・Some of the infrastructure facilities in are open to the public for tours, events, and other occasions. This is part of the Tokyo Metropolitan Government’s efforts to promote public understanding of its projects and to help people learn about infrastructure. Although those facilities are not always open to the public, you can discover little known facts about infrastructure by participating in various events. ・Listed below are some of the TMG’s infrastructure facilities that are open to the general public to visit. Why not visit one? ※With Tokyo hosting the Olympic and Paralympic Games in 2020, the Bureau of Waterworks is strengthening counterterrorism measures at its purification plants to ensure the stable supply of safe and tasty tap water. The plants are therefore not open to the general public.

Bureau in See Facility Location charge page Bureau of Kachidoki Bridge 6 Tsukiji, Chuo-ku 80 Construction (Departure location) Takeshiba Small Ship Bureau of Port Inspection ship Shin-Tokyo-Maru 80 Terminal and Harbor Kanda River / Ring Road No. 7 Bureau of 2-1-1 Horinouchi, Suginami-ku 81 Underground Regulating Reservoir Construction Bureau of Ogibashi Lock Gate 1-5-18 Sarue, Koto-ku 81 Construction Bureau of Super levee / esplanade (Sumida River) Chuo-ku, Koto-ku, Taito-ku, Sumida-ku 82 Construction Bureau of Hama-rikyu Gardens Hamarikyu-teien, Chuo-ku 83 Construction Aomi Frontier Building 20F, 2-4-24 Aomi, Bureau of Port TOKYO minatorie 83 Koto-ku and Harbor Bureau of Water Reclamation Center Various places in Tokyo 83 Sewerage Bureau of Hamura Intake Weir 3-8-32 Hanehigashi, Hamura City 84 Waterworks Bureau of Ogochi Reservoir Okutama-machi, Nishitama-gun 84 Waterworks

・The Tokyo Metropolitan Government Technology Council has launched a portal that aggregates infrastructure- related information such as stock effects of infrastructure, details of projects, and events at infrastructure facilities. ・Tour and event information is updated as needed. For the latest information, please see the Tours/Events section of the Infrastructure Portal.

[Main contents] - Examples of stock effects (documents available for download) - Information on tours and events

ＵＲＬ：http://www.infura.metro.tokyo.jp/eng/top.html

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Location: 6 Tsukiji, Chuo-ku Bureau of ・Kachidoki Bridge was built in part to serve as the main Construction gate to the World’s Fair, which was planned to be held as a national event. Cutting-edge technologies of the time Kachidoki Bridge Museum [admission free] were used for its construction. Although the fair was ・ A facility that used to cancelled with the intensification of the -China War, generate electricity for the bridge was completed in June 1940. raising the bridge was ・Kachidoki Bridge opens in the middle to allow passage of renovated and turned into a boats. Back when it was completed, it was known as the museum that displays and exhibits materials on greatest bascule bridge in the East. However, with Kachidoki Bridge and other decreased boat traffic on the Sumida River and increased crossings of the Sumida River, road traffic, the bridge has not been raised since including valuable items. Map November 29, 1970.

Illuminated Kachidoki Bridge Kachidoki Bridge raised (photo taken in 1951)

Bureau of Location (departure): Takeshiba Small Port and Harbor ・Shin-Tokyo-Maru is an inspection ship that Ship Terminal the Bureau of Port and Harbor operates to allow many people to learn about the role Service route of the Port of Tokyo, which is deeply related to daily life. ・From the ship, you can see the Port of Tokyo and its rapidly evolving infrastructure. A guide will introduce sights such as port terminals and many other logistics facilities, urban development in Tokyo Waterfront City, and the Shinkaimen Landfill Site.

To make a reservation, please visit the 【視察船「新東京丸」利用案内】(Guide to inspection ship Shin-Tokyo-Maru) section of the Bureau of Port and Harbor website (in Japanese). The ship ride is free of charge.

●Service route ●Timetable

Tuesday Wed/Thu/Fri Tuesday Wed/Thu/Fri

Board Takeshiba Small Ship Terminal Takeshiba Small Ship Terminal AM 10:00-11:15 10:00-11:30

Deboard Aomi Passenger Ship Terminal Takeshiba Small Ship Terminal PM 13:30-14:45 13:30-15:00

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Location: 2-1-1 Horinouchi, Bureau of Construction Suginami-ku

・The Kanda River / Ring Road No. 7 Underground Regulating Reservoir is a huge underground tunnel that was constructed beneath Kannana-dori Avenue (Ring Road No. 7) with the aim of quickly enhancing safety from flooding in the flood-prone Kanda River middle basin. It can store approximately 540,000 cubic meters of overflow from the Kanda, Zenpukuji, and Myoshoji rivers.

・Tours of the reservoir are available on Tuesday and Thursday (excluding TMG holidays), starting from 10 a.m. and 2 p.m. (reservation required).

Event information

[Experience a giant tunnel beneath Kannana-dori Ave.] ・About 45 meters beneath Kannana-dori Avenue, there is a 4.5km- long regulating reservoir with an inner diameter of 12.5 meters. During the on-site tour, staff will explain about the roles and Reservoir interior mechanism of this facility. - Event held around July - Participation limited to 200 people

Shield machine

Bureau of Location: 1-5-18 Sarue, Koto-ku Construction ・The Ogibashi Lock Gate is located midway down the Onagi River, which flows east-west through the Koto delta. ・Just like the lock system of the Panama Canal, this facility enables boats to pass from one water level to another by changing the water level in a chamber that has gates at both ends.

Event information - Event held around July [Discovering the Panama Canal in Tokyo!?] - Participation limited to 70 people ・ Participants can experience riding a boat on the Onagi River and passing through the Ogibashi Lock Gate, which enables navigation between rivers of different levels. Accompanying staff will explain about the roles and mechanism of this facility.

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Location: Chuo-ku, Koto-ku, Bureau of Construction Taito-ku, Sumida-ku, etc. ・Super levees are constructed along the Sumida River and other major rivers that flow through lowland areas in eastern Tokyo. The construction of a super levee and the development of riverside areas are conducted in an integrated manner in cooperation with the developers. ・Replacing concrete seawalls with wide revetments made of soil enhances earthquake resilience and creates a relaxing and pleasant waterside.

View of the Okawabata district seen from the Shinkawa district （Super levee along the Sumida River）

・It takes many years to complete a super levee, because the project is conducted in conjunction with large development of the area by the river. ・Therefore, esplanades (part of super levees) are built, beautified, and made open to the public before the completion of the development project to allow people to enjoy jogging and strolling along the waterfront.

Esplanade lit up for a beautiful night view

First outdoor café opened on a Landscaping to enjoy the water Leaflet on the riverbank in Tokyo Sumida River

Event held on the Sumida River esplanade Information on events, etc. ・Along the Sumida River, various events are held throughout the year on super levees and esplanades for people to enjoy the waterside. ・The waterside vitality that existed in the when Tokyo was known as the “city of water” is returning by making the most of deregulations. Ferry network utilizing disaster management piers

“Kawa-terrace” space Minamo-no-Saiten marine sports festival

Riverside Autumn Festa Floating lanterns on the river

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Location: Hamarikyu-teien, Bureau of Chuo-ku Construction ・Located in central Tokyo, the Hama-rikyu Gardens weave history, - Admission fee: 300 yen for adults and culture, and nature to contribute to the creation of Tokyo’s 150 yen for seniors (ages 65+) elegant cityscape. It is also a tourism attraction conveying traditional Edo culture. ・Once a falconry ground for the Tokugawa shogun, it later became the family’s villa, Hama-goten. In 1870, the site came under the jurisdiction of the then Ministry of the Imperial Household and became an imperial villa, called Hama-rikyu. ・In November 1945, the property was granted to the Tokyo Metropolitan Government, upgraded, and opened to the public Daisensui garden pond for a fee in April 1946. In November 1952, it was designated by the national government as a Special Place of Scenic Beauty and Matsu-no-Ochaya teahouse and Special Historic Site. Otsutai Bridge

Location: Aomi Frontier Building 20F, Bureau of 2-4-24 Aomi, Koto-ku Port and Harbor

・TOKYO minatorie is an exhibition space that introduces visitors to the history, current form, and future of the Port of Tokyo and the Waterfront City by taking full advantage of its location overlooking the waterfront area from 100 meters above the ground. ・Experience AR visuals first hand with the “Port Creation Virtual Explorer,” and enjoy different views linked with a 55-inch touchscreen monitor that provides various information about the waterfront area.

Future Deck Communication Deck Open: 10 a.m.–6 p.m. on Tue, Wed, Thu, Sun 10 a.m.–9 p.m. on Fri, Sat, the day before holiday Closed: Monday and New Year holidays (from Dec. 28 to Jan. 4) History Gallery Access: A 1-minute walk from Telecom Center Station on Yurikamome Line

- Admission free - Please make a reservation in advance if you are visiting in a large group - This facility opened on April 28, 2017. Edo Ｄeck Port Ｄeck

Bureau of Sewerage ・There are 20 water reclamation centers in Tokyo. They treat Former Mikawashima Wastewater Treatment wastewater and release the treated water into rivers and the sea. Plant pump facilities ・Water reclamation centers take reservations for those who want （located within the Mikawashima Water Reclamation Center grounds） to see the facilities on days other than Saturdays, Sundays, ・As part of the first modern wastewater treatment plant national holidays, and New Year holidays. in Japan, these facilities have been recognized as having significant historical value and were the first in the sewerage field to be designated by the national (Contact for reservations and inquiries) government as an Important Cultural Property To visit a water reclamation center in the (structure). 23 special-ward area, please contact Visitor Coordination at 03-3241-0944.

To visit one in the Tama area, please contact the water reclamation center that you want to see.

(Assistance in Japanese only) Shibaura Water Reclamation Center

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Bureau of Location: 3-8-32 Hanehigashi, Hamura City Waterworks ・The Hamura Intake Weir was built in 1653 to direct water to the Tamagawa Josui water channel, which was constructed to supply water to Edo (now central Tokyo) when the area’s population was rapidly increasing. The intake is still used to send water from the Tama River to the Ozaku and Higashimurayama purification plants. ・A steel beam is installed at right angles to the river course. Log posts are set against the beam, and other materials are subsequently placed, including fascines, straw mats, and then gravel. This is how a nagewatashi weir is constructed. ・A nagewatashi weir is designed to be washed away should the water level rise. Specifically, when the water level rises in the Tama River, the beam is raised to release the posts and wash away fascines, straw mats, gravel, and other materials. ・This nagewatashi weir has been designated by the Japan Society of Civil Engineers as its recommended civil engineering asset. Although the current concrete framework was actually built after the Edo period, in 1909, the weir was recognized as a structure with historical value that supported the development of Edo, and the fact that the nagewatashi weir technique has been passed down to the present day was highly appraised.

Maintenance bridge

Steel beam Log posts

Horizontal logs Fascines Straw mats Gravel Main stream of the Tama River

Cross section of the nagewatashi weir Hamura Intake Weir Nagewatashi weir during rising waters

Bureau of Location: Okutama-machi, Nishitama-gun Waterworks ・Located at the west end of Tokyo, Ogochi Reservoir is approximately 65 kilometers away from the city center. The reservoir straddles three municipalities—Okutama-machi in Tokyo’s Nishitama-gun and Tabayama-mura and - mura in ’s Kitatsuru-gun. Construction started in 1938. Completed in November 1957, it is Japan’s largest dedicated reservoir for water supply.

Overview Okutama Water and Green Museum ・Effective storage capacity: 185.4 million cubic meters ・Located adjacent to Ogochi Reservoir, the Okutama Water and ・ Type: Non-overflow, straight gravity concrete dam Green Museum is jointly operated by the TMG Bureau of ・ Height: 149 meters Waterworks and Okutama Town. Here you can enjoy learning ・ Crest length: 353 meters about the nature and history of Okutama and the mechanism of water and nature.

Information ・Address: 5 Hara, Okutama-machi, Nishitama-gun ・Open: 9:30 a.m.–5:00 p.m. ・Closed: Wednesday (Thursday if Wednesday falls on Easy-to-understand explanation a national holiday) and New Year holidays on the mechanism and roles of (from Dec. 28 to Jan. 4) Ogochi Reservoir is provided with a diorama and a glass projection screen.

Visitors can enjoy quizzes on the Ogochi Dam and headwaters.

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