Daihatsu traces its history to 1907, when production began in Osaka as Hatsudoki Seizo Co., which makes it the oldest internal-combustion vehicle manufacturer in Japan. After decades of building engines and three-wheeled vehicles, the company adopted the Daihatsu name and later became part of the Toyota group, specialising in small cars and kei-class commercial vehicles. By the 1960s it had established the formula that still defines the brand today.

Daihatsu is known for compact, efficient engineering, and its Hijet van and truck have served Japanese trades since 1960. The Gran Max continues that line in Asian markets, the Delta series covered heavier light-duty work, and models such as the Rocky and Terios brought the same philosophy to small four-wheel drives. Kei-class regulations kept these vehicles compact and light, which made them easy to drive, park and run in crowded cities.

The Daihatsu manuals here typically cover the three- and four-cylinder engines in full, along with carburettor and EFI systems, manual and automatic transmissions, driveshafts, suspension, brakes, steering, heating and air conditioning. Wiring diagrams, torque tables, diagnostic procedures and maintenance schedules are usually included.

These manuals suit DIY owners servicing a Hijet or Gran Max, independent garages working on imported kei vans, and workshops keeping older Delta trucks on the road. Each is a downloadable PDF that you can print or view on a phone at the bench. Clear exploded drawings help identify parts before ordering, which matters for older imports.