|Project Details||Population of the Shiga prefecture in 1977: 1,000,000 |
Population of the Kinki area in 1977: 14,500,000 
The transparency of Lake North was 8 to 10m until the 1920s, but then gradually decreased to 4 to 6m around 2000. In Lake South it as only 2m.
The concentration of nitrates at 1m above the bottom of the lake at 80m depth on the Takashima Hikone line of Lake North increased from 0.05 mg/L at the end of the 1950s to 0.26mg/l in the 1990s. The total phosphorus concentration of the water column in Lake North was continuously recorded from 1963 to 1981. Based on this result, it was estimated that the total phosphorus content in the lake increased at a rate of 7.0t/year during this time. 
A freshwater red tide in Lake Biwa was observed for the first time in 1977, reaching the highest number of days of occurrence in 1979 (17 days) and the total number of water areas in 1978 (88 water areas). After 1979, both, days of occurrence and total water areas have tended to decrease, and the red tide has not occurred in some years. 
In 1977, when a large amount of red tides was generated, the powder soap usage rate was about 10% (estimated by the Shiga Prefecture). Yet, due to efforts by the residents to promote the use of powder soap, two years later, in 1979, the number of people using only powder soap increased by 26%, and those using primarily powder soap increased by 28.1%. In 1980, when the Lake Biwa Ordinance, created by the movement of the residents, was enacted, those who used only powder soap reached 70.6% of the total. In the following year, the enforcement of the ordinance Lake Biwa, the rate of powder soap use dropped sharply to 55.3%, to 49.2% in the following year, and by 20% two years later. After, it continued to decrease gradually, and fell under 40% in 1987 and to about 30%. 
Regarding the number of civic organizations in the Prefecture to promote the usage of powder soap to protect Lake Biwa, at the establishment of a general meeting (1978), there were 96 groups, of which some 80 groups represented by women's groups, consumer groups, and businesses such as soap retailers and life promotion councils of 16 municipalities of the Shiga area. In 1988, among the activities of the "Political promotion project to protect the water environment" of the prefectural government, the living promotion councils were established in all the former 50 municipalities. As a result, the number of constituent groups of the meeting increased to 137. However, it began to decrease.gradually. At the time of the general meeting of dissolution on 27 May, 2008, the number of constituent groups of the meeting had decreased to 86 groups including 26 life promotion councils (Note: in Shiga Prefecture in the year 2004, the number of municipalities were reduced from 50 to 26 municipalities after a municipal merger). 
Although at the second paragraph of (1) below the figure in p.529 of ref. , it is said that "As fund for maintenance of drainage processing facility necessary for drainage standard adaptation, prefecture prepared special loan system for small and medium-size enterprises, but the loan balance of this at the end of March 1958 was 1,510 million yen" (about USD 13,500,000.00). We do not recognize this as project investment.