1. An analysis of drug-related offenses in Japan: focusing on a discussion of future preventive measures;Inoue;J. Forensic. Leg. Med.,2011
2. Metropolitan Police Department, https://www.keishicho.metro.tokyo.jp/about_mpd/jokyo_tokei/tokei/k_tokei30.files/ktb012.pdf. (Accessed 2020) Last accessed Jan. 25, 2020 (in Japanese).
3. Ministry of Health, Labour and Welfare, https://www.mhlw.go.jp/bunya/iyakuhin/yakubuturanyou/scheduled-drug/index.html. (Accessed 2020) Last accessed Jan. 28, 2020 (in Japanese).
4. Miyagi Prefectural Government, https://www.pref.miyagi.jp/soshiki/yakumu/siteiyakubututoha.html. (Accessed 2020) Last accessed Jun. 1, 2020 (in Japanese).
5. Saitama Prefectural Police, https://www.pref.saitama.lg.jp/a0707/dame-zettai/documents/chapter2.pdf#search=%27%E8%96%AC%E7%89%A9%E4%BA%8B%E7%8A%AF%27. (Accessed 2020) Last accessed Jun. 1, 2020 (in Japanese).