Japan is set to make a significant shift in its cannabis policy by criminalizing personal use while simultaneously legalizing medical products derived from the plant. According to Kyodo News, the health ministry confirmed Thursday that these changes, aimed at regulating cannabis use and expanding access to cannabis-derived medicines, will take effect on December 12. See Also:Japan Could Become First To Allow CBD In Food Japan Will Criminalize Cannabis UseAlthough Japan has long banned the possession and cultivation of marijuana, the country had yet to penalize its use. This loophole was initia…