This is a Tomica No. 116 Super Ambulance, specifically the Isuzu Giga variant used by the Tokyo Fire Department.
Key Features
Model: Based on the large-scale Isuzu Giga "Super Ambulance" (Supa Anburansu).
Design: Features the distinct white body with a red stripe and green Kanji characters 消防庁 (Shōbōchō), which means Fire Department.
Functionality: The real-life vehicle and the Tomica toy are known for their extendable side panels, which expand to create a mobile emergency treatment room.
Condition: See photos for details. WYSIWYG.