The opinion that there were chapters which were sequel to the previous chapter (vertical narabi) or had the same time setting as the previous chapter (horizontal narabi) (the opinion advocated by Kikan IKEDA and others).
前にある巻の話に続く話の巻（縦の並び）と前にある巻の話と同じ時間帯の話の巻（横の並び）があるとする説（池田亀鑑などの説）