The Honda Acty Van, part of the broader Honda Acty lineup, was first introduced in Japan in 1977 as a kei-class vehicle. Kei cars, or "keijidōsha," are a category of small vehicles designed to comply with strict Japanese regulations regarding size and engine displacement. These regulations were created to promote affordable and efficient transportation in Japan’s crowded urban areas.
https://world4vehical.com/honda-acty-van-review-performance-and-price/

The Acty Van quickly gained popularity due to its compact size, fuel efficiency, and ability to navigate narrow streets with ease. Over the years, Honda has updated the Acty Van to meet modern standards, but it has always retained its core identity as a practical and reliable utility vehicle.