Umi, sono-nozomashii mirai' (literally, Preferable future of Ocean), a book illustrated with photographs related to the exposition, and "An official long record film, Okinawa Ocean Expo," a record film of the exposition, recorded the Crown Prince and Crown Princess attending both the opening ceremony and the closing ceremony, which is still kept in libraries and so on.
海洋博の写真を収めた書籍「海その望ましい未来」、海洋博の記録映画『公式長編記録映画沖縄海洋博』にも開会式・閉会式に参列した皇太子夫妻の姿が収録され現在でも図書館などで目にすることができる。