Cross-Lingual Information Retrieval based on LSI with Multiple Word Spaces. - Tatsunori Mori; Tomoharu Kokubu; Takashi Tanaka (NTCIR, 2001)

Evaluating retrieval performance for Japanese question answering: what are best passages? - Tetsuya Sakai; Tomoharu Kokubu (SIGIR, 2003)

Toshiba ASKMi at NTCIR-4 QAC2. - Tetsuya Sakai; Yoshimi Saito; Yumi Ichimura; Makoto Koyama; Tomoharu Kokubu (NTCIR, 2004)

ASKMi: A Japanese Question Answering System based on Semantic Role Analysis. - Tetsuya Sakai; Yoshimi Saito; Yumi Ichimura; Makoto Koyama; Tomoharu Kokubu; Toshihiko Manabe (RIAO, 2004)

The effect of back-formulating questions in question answering evaluation. - Tetsuya Sakai; Yoshimi Saito; Yumi Ichimura; Tomoharu Kokubu; Makoto Koyama (SIGIR, 2004)

The Relationship between Answer Ranking and User Satisfaction in a Question Answering System. - Tomoharu Kokubu; Tetsuya Sakai; Yoshimi Saito; Hideki Tsutsui; Toshihiko Manabe; Makoto Koyama; Hiroko Fujii (NTCIR, 2005)

Toshiba BRIDJE at NTCIR-5 CLIR: Evaluation using Geometric Means. - Tetsuya Sakai; Toshihiko Manabe; Akira Kumano; Makoto Koyama; Tomoharu Kokubu (NTCIR, 2005)

Toshiba BRIDJE at NTCIR-6 CLIR: The Head/Lead Method and Graded Relevance Feedback. - Tetsuya Sakai; Makoto Koyama; Tatsuya Izuha; Akira Kumano; Toshihiko Manabe; Tomoharu Kokubu (NTCIR, 2007)