Kanmushi is one of the 63 creepy germs written in Harikikigaki, a book of medical knowledge written in 1568 by a unknown resident of Osaka. This tiny malevolent creature is believed to cause human illness during the 16th century in Japan.
It is a harmful parasite that embeds itself in the spine, causing it to curve backward. Infected people also develop an appetite for spicy food. The herbs mokko and byakujutsu are effective in fighting off Kanmushi.