According to wikipedia, that length is normal: “They generally have 1.8 m (6 ft) pickup beds with fold-down sides; dump and scissor-lift beds are also available, as are van bodies. The length limitation forces all of these models into a cab-forward design.”
Edit: revised guess Judging by the design of the driver door, I’m guessing this is a 92/94’s Honda Acty, which has a bed length of 6.3ft
https://davidsclassiccars.com/honda/498957-03994-honda-kei-mini-truck-rare-color-rust-free-5-speed-no-reserve-auction.html
According to wikipedia, that length is normal: “They generally have 1.8 m (6 ft) pickup beds with fold-down sides; dump and scissor-lift beds are also available, as are van bodies. The length limitation forces all of these models into a cab-forward design.”