International Tele-Education Experiment using CAI System on the World-Wide Web. - Yasuhisa Kato; Jun Hirai; Yoshimi Fukuhara; Mitsuru Yamada (WebNet, 1997)

WebBase: a repository of Web pages. - Jun Hirai; Sriram Raghavan; Hector Garcia-Molina; Andreas Paepcke (Comput. Networks, 2000)

Extracting User Behavior by Web Communities Technology on Global Web Logs. - Shingo Otsuka; Masashi Toyoda; Jun Hirai; Masaru Kitsuregawa (DEXA, 2004)