driver koyoshi is single.ut he didn't want to be left out. >> translator: i'm envious of the other drivers whose trucks are covered with their kids' drawings. i often admire them from afar. >> reporter: a colleague enlisted his son to make a picture for koyoshi. the boy prepared carefully, observing his dad's friend taking care of his truck. then he let inspiration guide his hand. >> translator: if accidents happen frequently, maybe nobody would want to drive trucks anymore. what's going to take their place? i hope people follow traffic rules more closely. >> reporter: the drawing is doing its part time prove driving. >> translator: it's done. it's done. >> reporter: he even drew a portrait of koyoshi. >> translator: it's good. i can see he put a lot into this. >> reporter: now when koyoshi sets out on deliveries, he proudly displays the decoration and feels a sentiment. when stuck in traffic he's inspired to keep calm and concentrate on the cars around him. another delivery, another safe arrival. >> translato