BANGKOK, Nov. 19 -- A Thai content creator has managed the rare feat of irritating two nations at once after clambering onto the roof of a parked car, whipping off his shirt and breaking into an exuberant dance outside the famed Fuji-view Lawson convenience store in Fujikawaguchiko, Japan.

The clip, posted by Jack Papho, was barely three hours old before it was engulfed by more than 12,000 furious comments.

Many accused him of embarrassing Thailand abroad; others simply unfollowed him in silent protest.

Japanese media quickly piled in, running headlines lamenting the "disgrace to Thailand", and noting that the antics were particularly unwelcome amid the country's worsening overtourism problem.

The incident played directly into long-si...