About This Site


The contents are provided in FY2001 and based on the special exhibition catalog “the exhibition of National Diet Library collections part 3 : the Japanese Calenders”, holded at National Diet Library between October 23 and November 2, 1979.
The editing is based on the catalog and some commentaries about Daisho-reki calendar are added.
All of the materials provided on the contents are held by National Diet Library.


Yoshiro Okada, Chairman of Koyomi no kai (President of the Society of Calenders) and professor emeritus of Bunka Women’s University, is the editor in charge of this project.
We would like to express our appreciation and recognition for his cooperation.

Bibliographic Matters

As a rule, the titles of bibliography and the image are provided from the exhibition catalog, mentioned above.
The datas are parts of the bibliography, while we add some descriptions to provide this contents.
The classification is by Nippon Decimal Classification 9th edition.

Update Information

Design and constitution of website were all renewed on March 18, 2016.


Links to this content are basically free. For linking, the banners below are available.

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Reproduction of the Contents

The images in this exhibition may be reproduced in other media without applying to the NDL. If you wish to reproduce the contents, please make sure to read Terms of Use of the National Diet Library Digital Exhibitions on the NDL website in advance.

The user must cite the source when using the Content. Sources should be cited in the following manner:

(Examples of source citation)
The Japanese Calendar (https://www.ndl.go.jp/koyomi/)

Web Accessibility

The National Diet Library strives to make its website accessible to people of all capabilities and ensure that content is perceivable, operable, and understandable in accordance with the National Diet Library accessibility policy (Japanese) based on JIS X 8341-2:2010 "Guidelines for older persons and persons with disabilities-Information and communications equipment, software and services-Part 3: Web content". We hereby provide our website test results (Japanese).


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Reader Services and Collections Department
National Diet Library
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Tokyo 100-8924