Abstract
Variation of typesetting layout was investigated for series publications such as "Bunko" by measuring spaces between characters and lines over years. Nineteen types of series publications among the Aichi University Library holdings had similar character sizes, character space and line spaces. The character density of books of Iwanami Bunko decreased around 2007. A novel, "Norwegian Woods" by Haruki Murakami published in several formats showed the hard cover version had the least dense. Layouts of several ebook apps had similar character space/line space ratios for Kinoppy (iPad and HTC) and iBunko (iPad-gothic, HTC), but those for iBunko (iPad-mincho) and GARAPAGOS (HTC) were less dense.
