日本における電子書籍化の現状:─国立国会図書館所蔵資料の電子化率調査─  [in Japanese] Current Situation of e-books in Japan:Survey on the Ratio of Conversion into e-books of the Printed Books Collection of the National Diet Library  [in Japanese]

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Abstract

<p> 印刷本のうち,電子書籍版が提供される割合は,年々,高まっていると考えられる。電子書籍化の進展を測るために,国立国会図書館の蔵書から印刷版の書誌データを得て主要な電子書籍プラットフォームの提供データと照合し電子化率を調査する手法を考案し,調査した。1)近年,電子化率は高くなっている,2)出版点数の多い出版社ほど電子化率は高い,3)各プラットフォームの提供する電子書籍には重なりがある,4)コミックの電子化率は高い,5)学術書の電子化率は高い,6)小説の電子化率は高いという仮説を設定した。 調査の結果,2017 年の電子化率は,36.6%となり,全ての出版物に展開した場合,約3 万点の電子書籍があると推計した。調査結果は,2)と5)以外の仮説を支持するものであった。 次に,国立国会図書館デジタルコレクションの収録件数を1901 年から1980 年まで調査し, 1960 年頃から2000 年頃までの間に電子書籍化の空白期間があることを指摘した。</p>

<p>The ratio of printed books being converted to e-books is increasing every year. To measure the status of e-book conversion, we devised a method to acquire the bibliographic data of printed versions from the collection at the National Diet Library and compared it with the data provided by the main e-book platform, to calculate the e-book conversion ratio. We proposed the following hypotheses: 1) in recent years, the e-book conversion ratio has increased, 2) larger publishing companies with more publications have a higher e-book conversion ratio, 3) the e-books available on each platform overlap, 4) the e-book ratio of comic books is high, 5) the e-book ratio of academic books is high, and 6) the e-book ratio of novels is high. The e-book ratio in 2017 was 36.6%, and thus, it was estimated that there are now around 30,000 e-books. With the exception of 2) and 5) the findings supported the other hypotheses. In addition, the number of records of the National Diet Library Digital Collections was investigated from 1901 to 1980. It was noted that there was a blank period of e-books between the period around 1960 and 2000.</p>

Journal

  • Journal of Japan Society of Library and Information Science

    Journal of Japan Society of Library and Information Science 65(2), 84-96, 2019

    Japan Society of Library and Information Science

Codes

  • NII Article ID (NAID)
    130007668673
  • NII NACSIS-CAT ID (NCID)
    AA11333306
  • Text Lang
    JPN
  • ISSN
    1344-8668
  • NDL Article ID
    029751719
  • NDL Call No.
    Z21-133
  • Data Source
    NDL  J-STAGE 
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