平成20年版 環境・循環型社会白書 第2節 循環型社会の歴史

Urban Farm DB summary

In the Edo period, human waste and ash were stabilized hygienically in 'koidame' pits and traded to surrounding farms as fertilizer, sustaining a regional circular economy that kept cities clean. After WWII, land reform and the spread of chemical fertilizer left human waste with nowhere to go, prompting a shift from the Sanitation Law (1954) to the Waste Management Law (1970); municipal composting facilities built in the 1960s-70s were largely abandoned due to contamination, odor complaints, and the labor burden on aging farmers.

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 800 t_per_day

  daily waste generation(tokyo waste collection)

  Social

  region

  Tokyo (city center)

  year

  明治44年(1911)

• 290 g_per_person_per_day

  per capita waste generation(tokyo waste collection)

  Social

  region

  Tokyo

  year

  明治44年(1911)

  method

  population approx. 2.75 million

• 1,600,000–3,000,000 cho↑ Increase

  cultivated area(edo period rice fields)

  PolicyControl: 慶長年間(1596-1614)水準 約160万町歩

  region

  Japan

  year

  1596-1735

Direction of conclusions

Each author conclusion is recorded only as a coded direction per topic. Read the original for the conclusion itself.

• Compost / nutrient cycleMixedWith caveats