A kid and his younger sibling are enjoying Super Mario Bros. 3 on their Famicom console while their mom is at work. However, she calls them to her store before finishing her shift, causing some time to pass. The boy continues playing, but his sister grows impatient and leaves without him. Being too young to navigate the streets alone, she gets lost. In search of his sister, the boy ventures out and nearly encounters a hazardous situation when he is almost hit by a car driven by Mario. After getting out safely, he delivers a brief lecture on road safety to the driver before continuing his search for his missing sibling.
Super Mario no Koutsuu Anzen is a Toei produced public service announcement released in 1989 based on Super Mario Bros. 3 for use in schools across Japan. The video was released on two formats; both VHS and 16mm film. Super Mario no Koutsuu Anzen is still used across Japanese schools today. Very little is known about the video, and its release status is a mystery. To date, the entire film has never shown up online. The film can still be rented from select Japanese libraries in 16mm format. They were never sold to the general public, and only to Japanese schools.(Source: Super Mario Wiki)