As taxi driver Hirohisa Mitsuda washes his vehicle prior to a day's work, he tries to make sure the windows are spotless because his passengers hardly ever get to enjoy the outdoors.

"This is a rare chance for the passenger to go outside and see," he said.

Mitsuda drives a so-called nursing taxi, catering specifically for the elderly and disabled. He takes care to keep the ride smooth for his passengers, avoiding sudden braking or turns. He also helps his passengers, who are often in a wheelchair or an ambulance bed, get in and out of the vehicle.