A ‘Super Hazmat; unit from the Tokyo Fire Department’s famed Hyper Rescue unit, more formally known as the Fire Rescue Task Forces. Picture by Guwashi999.
Note how thin the actual ambulance is:
Image courtesy of Jeffrey Friedl.
While the one above is a Toyota model, the Mitsubishi Fuso fleet is also a popular alternative. Fuso is a Japanese manufacturer of trucks and buses and is a subsidiary of German car manufacturer Daimler AG.