[2] Funerary models of pig toilets from the Han dynasty (206 BC to AD 220) prove that it was an ancient custom.
[3] These arrangements have been strongly discouraged by the Chinese authorities in recent years,[4] although as late as 2005 they could still be found in remote northern provinces.
[5] Chinese influence may have spread the use of pig toilets to Okinawa (Okinawan: ふーる (fūru) / 風呂) before World War II,[6] and also to the Manchu people during the Qing dynasty period.
[8] A 2003 survey of sanitary arrangements in Goa and Kerala found that 22.7% of the population still used pig toilets.
[12] In Vietnam, the traditional fish pond toilet, which was described as "widespread" as recently as 2008, polluted the waterways, but was perceived as more hygienic (less odorous) than various modern alternatives that the government was pressing on the villagers.