R/O-426 is a restaurant located in the Harajuku neighborhood of Shibuya-ku, Tokyo, Japan. It is associated with Piazza Food Systems Co. Ltd., which also runs Bakery Cafe 426, Maison de Caviar BELUGA, Cigar and Cafe Bar Chardonnay, Bakery Cafe 632, Dennis American Grill, R/O 111, and Bakery Cafe 129.
R/O-426 is located on a patio just off Omotesando Dori. Food is served from a classic Airstream trailer. Diners sit at tables outside.