E Project, designed by Kiyonori Kikutake's architectural office in 1978, represents a distinctive approach to service area design. This facility showcases innovative integration of functional programming with challenging topographical conditions, featuring a sloped parking structure as its defining characteristic. The project exemplifies Kikutake's philosophy of organic architecture, where built form harmoniously responds to natural terrain. The design demonstrates thoughtful consideration of vehicular circulation and spatial efficiency within a highway service context. Though documentation remains limited, E Project remains a noteworthy example of 1970s Japanese infrastructure architecture that merits closer examination by those interested in contemporary design solutions and landscape integration strategies.