本文的目的是提供日本数字图书馆的纵览,即日本数字图书馆工程和数字图书馆相关研究。由于日本数字图书馆概念表述的不统一性,本文首先简要概述了日本数字图书馆概念的几种表述方式,然后按类汇总归纳了日本过去及现在的各种数字图书馆工程,同时列举了当前日本数字图书馆的研究状况。最后,作者对日本数字图书馆现状作出了扼要的总结。 The purpose of this paper is to provide an overview of the Japanese digital library, the Japanese Digital Library Project and the Digital Library. Due to the inaccuracy of the concept expression of Japanese digital library, this article first briefly summarizes several ways of expressing the concept of digital library in Japan, and then summarizes the various digital library projects of Japan in the past and present by category. At the same time, Research Status of Japanese Digital Library. Finally, the author summarizes the current status of digital libraries in Japan.