Pop singers Jill Vidal and Kelvin Kwan Chor-yiu could be jailed for five years and barred from Japan after they were arrested for possessing cannabis in Tokyo last Tuesday.
Vidal and Kwan were arrested in the Dogenzaka shopping area, in the Shibuya district of Tokyo, Japanese media reports said.
Vidal, 26, a British passport-holder, and Kwan, 25, a Canadian passport-holder, were arrested at 1am and accused of possessing cannabis, which is illegal in Japan.
Shopkeepers in Dogenzaka called Shibuya police saying a foreign man and woman were trying to steal goods.
When police searched Kwan, they found cannabis concealed in a packet of cigarettes.
Kwan allegedly told police he brought the drug from Hong Kong. Vidal denied any criminal behaviour, saying she had no idea the packet contained cannabis, Kyodo News reported.