Tochigishiro (Japanese: とちぎしろ) is a cultivar of hemp grown in Tochigi Prefecture, Japan.
It meets international standards of non-narcotic agricultural hemp at about 0.2% THC,[2][3] reckoned "remarkably low" by Sensi Seeds.
[5] The modern variety was developed beginning in 1973 by Kyushu University professor of pharmacy Itsuo Nishioka from seeds "found in southern Japan",[6] and completed c. 1982 by the Tochigi prefectural government at Tochigi Agricultural Experiment Station in Tochigi-shi.
[7][8] According to a National Institute of Mental Health-affiliated researcher, the strain is missing the enzyme tetrahydrocannabinolic acid synthase that makes most Cannabis capable of producing THC.
[9] It is the most widely grown cultivar in Japan in the 21st century, being exempt from prohibition under the Cannabis Control Law, due to its low levels of psychoactive chemicals.