The shoes, which feature a simple white sole and a tatami insole, are named for the Japanese term for a pair of mats placed side by side.
Created as part of Camper's Together programme – which sees them partner with international designers on products and stores – the shoes are available in brown, green and white versions.
The men's sandal has velcro straps that cross over the top of the foot and behind the heel, while the women's shoe is a slip-on with crossover straps.
The shoes are the latest in a series of collaborations between the British designer and the footwear brand, which has seen Morrison create stores and shoes, including a suede and canvas trainer.
Morrison is one of the world's most well-known and influential industrial designers, and recently came fifth among designers in Dezeen Hot List.
Beyond its footwear, the brand often commissions designers and architects to create installations or interiors for its stores. It collaborated with Neri&Hu for its Shanghai flagship, and with Brazilian architect Marko Brajovic on an installation made from 30,000 red shoelaces for its Melbourne store.
Morrison's Ni-jo sandals are on show at Camper's Montenapoleone store during Milan design week, which runs from 3 to 9 Apri.
Several other fashion brands have taken the opportunity to show new products during the fair, including Jil Sander, which has produced a capsule collection made using a Nendo print, and COS, which worked with Studio Swine to produce a bubble-blowing tree installation.