The operator of major Japanese conveyor belt sushi restaurant chain Sushiro says it has filed a reputational damage report to the police over a video posted on social media showing disturbing behaviors by a customer.

The company announced on Wednesday that it took the action on the previous day.

The video shows the customer at a Sushiro store licking a spout of soy sauce bottle at the table. It also shows the customer taking an unused tea cup from a self-service counter, licking it and putting it back.

The operator says it has learned that the footage was filmed at its outlet in Gifu City, central Japan.

The firm says it was a serious matter, damaging the trust between the operator and its customers.

Police say they have accepted the reputational damage report.

The operator says the customer and the guardian have apologized to the firm, but it will deal with the case strictly from both civil and criminal aspects.