General-purpose Digital Ticket Framework. - Ko Fujimura; Yoshiaki Nakajima (USENIX Workshop on Electronic Commerce, 1998)

Distributed digital-ticket management for rights trading system. - Kazuo Matsuyama; Ko Fujimura (EC, 1999)

Digital-Ticket-Controlled Digital Ticket Circulation. - Ko Fujimura; Hiroshi Kuno; Masayuki Terada; Kazuo Matsuyama; Yasunao Mizuno; Jun Sekine (USENIX Security Symposium, 1999)

Copy Prevention Scheme for Rights Trading Infrastructure. - Masayuki Terada; Hiroshi Kuno; Masayuki Hanadate; Ko Fujimura (CARDIS, 2000)

A world wide supermarket scheme using rights trading system. - Ko Fujimura; Masayuki Terada; Jun Sekine (ICPADS Workshops, 2000)

Trading Among Untrusted Partners Via Voucher Trading System. - Ko Fujimura; Masayuki Terada (I3E, 2001)

A Voucher-Integrated Trading Model for C2B and C2C eCommerce System Development. - Makoto Iguchi; Masayuki Terada; Yoshitaka Nakamura; Ko Fujimura (I3E, 2002)

Reputation rating system based on past behavior of evaluators. - Ko Fujimura; Takuo Nishihara (EC, 2003)

Requirements and Design for Voucher Trading System (VTS). - Ko Fujimura; Donald E. Eastlake III (RFC, 2003)

The EigenRumor Algorithm for Calculating Contributions in Cyberspace Communities. - Ko Fujimura; Naoto Tanimoto (Trusting Agents for Trusting Electronic Societies, 2004)

An Optimistic Fair Exchange Protocol for Trading Electronic Rights. - Masayuki Terada; Makoto Iguchi; Masayuki Hanadate; Ko Fujimura (CARDIS, 2004)

Managing Resource and Servent Reputation in P2P Networks. - Makoto Iguchi; Masayuki Terada; Ko Fujimura (HICSS, 2004)

P2P Digital Value Fair Trading System Using Smart Cards. - Masayuki Hanadate; Masayuki Terada; Shinji Nagao; Toshiyuki Miyazawa; Yukiko Yosuke; Seiji Tomita; Ko Fujimura (SPC, 2005)

XML Voucher: Generic Voucher Language. - Ko Fujimura; Masayuki Terada; Donald E. Eastlake III (RFC, 2005)

Voucher Trading System Application Programming Interface (VTS-API). - Masayuki Terada; Ko Fujimura (RFC, 2005)

Topic Structure Mining Using PageRank Without Hyperlinks. - Hiroyuki Toda; Ko Fujimura; Ryoji Kataoka; Hiroyuki Kitagawa (ICADL, 2006)

Blogosonomy : Autotagging Any Text Using Bloggers' Knowledge. - Shigeru Fujimura 002; Ko Fujimura; Hidenori Okuda (Web Intelligence, 2007)

Topic structure mining using temporal co-occurrence. - Hiroyuki Toda; Hiroyuki Kitagawa; Ko Fujimura; Ryoji Kataoka (ICUIMC, 2008)

Topigraphy: visualization for large-scale tag clouds. - Ko Fujimura; Shigeru Fujimura 002; Tatsushi Matsubayashi; Takeshi Yamada; Hidenori Okuda (WWW, 2008)

Discovering Association Rules on Experiences from Large-Scale Blog Entries. - Takeshi Kurashima; Ko Fujimura; Hidenori Okuda (ECIR, 2009)

Travel route recommendation using geotags in photo sharing sites. - Takeshi Kurashima; Tomoharu Iwata; Go Irie; Ko Fujimura (CIKM, 2010)

Classical music for rock fans?: novel recommendations for expanding user interests. - Makoto Nakatsuji; Yasuhiro Fujiwara; Akimichi Tanaka; Toshio Uchiyama; Ko Fujimura; Toru Ishida 001 (CIKM, 2010)

Hierarchical auto-tagging: organizing Q&A knowledge for everyone. - Kyosuke Nishida; Ko Fujimura (CIKM, 2010)

Effective Question Recommendation Based on Multiple Features for Question Answering Communities. - Yutaka Kabutoya; Tomoharu Iwata; Hisako Shiohara; Ko Fujimura (ICWSM, 2010)

Modeling Multiple Users' Purchase over a Single Account for Collaborative Filtering. - Yutaka Kabutoya; Tomoharu Iwata; Ko Fujimura (WISE, 2010)

Dynamic Network Motifs: Evolutionary Patterns of Substructures in Complex Networks. - Yutaka Kabutoya; Kyosuke Nishida; Ko Fujimura (APWeb, 2011)

Document area identification for extending books without markers. - Akihiro Miyata; Ko Fujimura (CHI, 2011)

User Similarity from Linked Taxonomies: Subjective Assessments of Items. - Makoto Nakatsuji; Yasuhiro Fujiwara; Toshio Uchiyama; Ko Fujimura (IJCAI, 2011)

Improving tweet stream classification by detecting changes in word probability. - Kyosuke Nishida; Takahide Hoshide; Ko Fujimura (SIGIR, 2012)

Extracting Communities of Interests for Semantics-Based Graph Searches. - Makoto Nakatsuji; Akimichi Tanaka; Toshio Uchiyama; Ko Fujimura (IEICE Trans. Inf. Syst., 2012)

Geo topic model: joint modeling of user's activity area and interests for location recommendation. - Takeshi Kurashima; Tomoharu Iwata; Takahide Hoshide; Noriko Takaya; Ko Fujimura (WSDM, 2013)

Travel route recommendation using geotagged photos. - Takeshi Kurashima; Tomoharu Iwata; Go Irie; Ko Fujimura (Knowl. Inf. Syst., 2013)