Genji Monogatari Emaki
The word "emaki" stems from the word "emakimono" meaning "picture scrolls". The emakimono picture scrolls consisted of two designs: Pictures that were painted on a scroll with text added to the same scroll or a number of paintings that accompanied passages of text and were joined together in a scroll. The first known picture scroll was produced in Japan during the late ninth or tenth century. The "Genji Monogatari" picture scroll, however, was produced in the early twelfth century. Not only is the "Genji Monogatari Emaki" the oldest surviving monogatari scroll but it is also the oldest surviving non-Buddhist scroll in Japan. There is no exact date to the scroll, but it is estimated to being sometime between 1120 and 1140, in which case it was created just a little over a century after Murasaki Shikibu wrote "The Tale of Genji".
Codex
The earliest surviving fragments from codices come from Egypt, and are variously dated (always tentatively) towards the end of the 1st century or in the first half of the 2nd. This group includes the Rylands Library Papyrus P52, containing part of St John's Gospel, and perhaps dating from between 125 and 160.
In Western culture, the codex gradually replaced the scroll. Between the 4th century, when the codex gained wide acceptance, and the Carolingian Renaissance in the 8th century, many works that were not converted from scroll to codex were lost. The codex improved on the scroll in several ways. It could be opened flat at any page for easier reading, pages could be written on both front and back (recto and verso), and the protection of durable covers made it more compact and easier to transport.