Three unregistered online sushi restaurants were ordered to close by the Food Safety Authority of Ireland (FSAI) after it was found they were being run from a Dublin bedroom.
Koi Sushi, Nagoya Sushi and Kyoto Sushi takeaway restaurants were all registered to the same house in the Santry area of Dublin and were ordered to close after the FSAI found them in breach of numerous laws around food and food safety.
Chief executive of the FSAI Dr Pamela Byrne expressed particular concern at the conditions in which the sushi products were being stored.
She said the conditions "posed a grave and immediate danger" to consumer health.
"Running a food business that has not been registered and is therefore not supervised is totally unacceptable and poses a very serious risk to consumers' health," she said.
"In these instances, the unregistered businesses were producing sushi without any hygiene or temperature controls. Sushi is a very high-risk product because it contains raw fish which must be kept chilled to reduce the growth of dangerous bacteria."
It can also contain cooked rice, which is a ready-to-eat product that must be kept chilled.
"In these instances, the absence of a food safety management system, no monitoring of the cold chain and no evidence of traceability of raw ingredients posed a grave and immediate danger to consumer health," Dr Byrne said.
The FSAI closure orders on the premises detail how food was being produced, processed and distributed in an unsatisfactory and unclean environment.
There was an absence of safe practice when handling raw fish and cooked rice, they say, with the enforcement order noting a lack of access to hand washing facilities in the 'food prep' area.
There was also no access to hot water, which posed "a serious risk to public health".