Japan (1)
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The first sewerage system in Japan can be seen in the large communities in the Yayoi Period (approximately 2,200 years ago). In the Nara Period (about 1,300 years ago), a drainage system network ran throughout the city in the Heijo-kyo capital area. In the Azuchi-momoyama Period (approximately 430 years ago), a stone culvert called the Taiko Sewerage was built around Osaka Castle. It is still in use today.

The first modern sewerage system in Japan was the Kanda Sewerage, which was built in 1884 in the Kanda area of Tokyo. In 1922, the first wastewater treatment plant, the Mikawashima Treatment Plant, was built. The construction of sewerage systems did not start in earnest until the end of World War II (1945).

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), P. 47.

   


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Early History

Sewer system in the Kanda area of Tokyo, photo circa 2000. The first modern sewerage system in Japan was the Kanda Sewerage, which was built in 1884 in the Kanda area of Tokyo. The construction of sewerage systems did not start in earnest until the end of World War II.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 46.

Mikawashima Treatment Plan in Tokyo, 1934. This plant, built in 1922, was the first wastewater treatment plant in Japan.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 47.

Taiko Sewerage in Osaka, photo circa 2000. In the Azuchi-momoyama Period (approximately 430 years ago), a stone culvert called the Taiko Sewerage was built around Osaka Castle. It is still in use today.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 47.

Geographic Features

Diagram showing general statistics about water environment and usage in Japan, circa 2001.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 12.

Japan's Sewerage Technologies

A prefabricated oxidation ditch (POD) is a small facility that is suitable for wastewater treatment in small municipalities. The factory-made units can be built in a shorter period of time and at a lower cost than traditional construction methods.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 27.

Diagram of small-diameter pipe jacking method used in Japan in many urban areas.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 27.

Konanchubu Wastewater Treatment Plant on Lake Biwa in Shiga Prefecture. Advanced treatment is used to meet environmental standards for the water quality preservation of this and other designated lakes.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 29.

Bricks made from the incinerated ash of sewage sludge were used in this area in Yokohama, Japan.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 31.

Incinerated ash from sewage sludge is close to the component of clay used in making cement. Therefore, the cement is used in secondary concrete products such as concrete manholes and pipes.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 31.

This rainfall radar system provides real-time information in Japan, where annual precipitation is twice as high as the world average. Japan often uses the "combined" system of wastewater and storm water, making the tracking of rainfall critical.

Source: Making Great Breakthroughs - All about the Sewage Works in Japan (Japan Sewage Works Association: Tokyo, ca. 2002), p. 33.

   


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