Advertising vehicles are advertisements posted all over the body of the truck. Tokyo Metropolitan Government has established its own design rules and regulates cars with Tokyo license numbers.
Despite the regulations, advertising vehicles with designs that may lead to deterioration of the scenery frequently run in the downtown area of Tokyo. Governor Koike expressed his intention to expand the scope of the regulation to all advertising vehicles running in Tokyo, and proposed that "Kyushu prefectures and cities need to unite and take countermeasures" The decision was made at a meeting held online on the 26th.