TOKYO - Japan's health ministry has approved a ban on a cannabis-derived ingredient named hexahydrocannabihexol, or HHCH, after so-called "cannabis gummies" containing such an ingredient has rendered many ill in the country.

The synthetic compound was designated as a controlled substance on Wednesday, after an expert panel of the Ministry of Health, Labour and Welfare on Tuesday approved the plan to prohibit the possession, use and distribution of HHCH, which will officially take effect on Dec 2.

Violators of the ban under the pharmaceutical and medical device law can be imprisoned for up to three years or fined up to 3 million yen, or $20,235

Violators of the ban under the pharmaceutical and medical device law can be imprisoned for up to three years or fined up to 3 million yen, or $20,235.

Earlier this month, five individuals fell ill after consuming gummies distributed by a man at a festival in western Tokyo, local media reported.

READ MORE: German cabinet okays landmark bill over legal cannabis use

In Japan's western prefecture of Osaka, meanwhile, more than 10 people have been sent to hospital this year after eating gummies potentially containing cannabis derivatives, with symptoms such as vomiting and numbness, according to the prefectural police.

According to local media reports, the Japanese health ministry is also considering banning all substances with structures similar to HHCH, which can cause hallucinations and memory impairment.

ALSO READ: Japanese whisky turns 100 as craft distilleries transform industry

THC, or tetrahydrocannabinol, is already banned in Japan as another psychoactive constituent of cannabis.