Automatic placement algorithms for high packing density V L S I. - Tokinori Kozawa; Hidekazu Terai; Tatsuki Ishii; Michiyoshi Hayase; Chihei Miura; Yasushi Ogawa; Kuniaki Kishida; Norio Yamada; Yasuhiro Ohno (DAC, 1983)

Efficient placement algorithms optimizing delay for high-speed ECL masterslice LSIs. - Yasushi Ogawa; Tatsuki Ishii; Yoichi Shiraishi; Hidekazu Terai; Tokinori Kozawa; Kyoji Yuyama; Kyoji Chiba (DAC, 1986)

Automatic Layout Procedures for Serial Routing Devices. - Yasushi Ogawa; Hidekazu Terai; Tokinori Kozawa (DAC, 1988)

Bucket Spreading Parallel Hash: A New, Robust, Parallel Hash Join Method for Data Skew in the Super Database Computer (SDC). - Masaru Kitsuregawa; Yasushi Ogawa (VLDB, 1990)

Timing- and Constraint-Oriented Placement for Interconnected LSIs in Mainframe Design. - Yasushi Ogawa; Tsutomu Itoh; Yoshio Miki; Tatsuki Ishii; Yasuo Sato; Reiji Toyoshima (DAC, 1991)

A New Indexing and Text Ranking Method for Japanese Text Databases Using Simple-Word Compounds as Keywords. - Yasushi Ogawa; Ayako Bessho; Masajiro Iwasaki; Mina Nishimura; Masako Hirose (DASFAA, 1993)

Simple Word Strings as Compound Keywords: An Indexing and Ranking Method for Japanese Texts. - Yasushi Ogawa; Ayako Bessho; Masako Hirose (SIGIR, 1993)

A New Character-based Indexing Organization using Frequency Data for Japanese Documents. - Yasushi Ogawa; Masajiro Iwasaki (SIGIR, 1995)

Effective & Efficient Document Ranking without using a Large Lexicon. - Yasushi Ogawa (VLDB, 1996)

Lessons from BMIR-J2: A Test Collection for Japanese IR Systems. - Tsuyoshi Kitani; Yasushi Ogawa; Tetsuya Ishikawa; Haruo Kimoto; Ikuo Keshi; Jun Toyoura; Toshikazu Fukushima; Kunio Matsui; Yoshihiro Ueda; Tetsuya Sakai; Takenobu Tokunaga; Hiroshi Tsuruoka; et al. (SIGIR, 1998)

Optimizing Query Evaluation in n-gram Indexing. - Yasushi Ogawa; Toru Matsuda (SIGIR, 1998)

NTCIR Advisor Report. - Yasushi Ogawa (NTCIR, 1999)

Structuring and expanding queries in the probabilistic model. - Yasushi Ogawa; Hiroko Mano; Masumi Narita; Sakiko Honma (TREC, 1999)

Overlapping statistical segmentation for effective indexing of Japanese text. - Yasushi Ogawa; Toru Matsuda (Inf. Process. Manag., 1999)

BMIR-J2: A Test Collection for Evaluation of Japanese Information Retrieval Systems. - Tetsuya Sakai; Tsuyoshi Kitani; Yasushi Ogawa; Tetsuya Ishikawa; Haruo Kimoto; Ikuo Keshi; Jun Toyoura; Toshikazu Fukushima; Kunio Matsui; Yoshihiro Ueda; Takenobu Tokunaga; Hiroshi Tsuruoka; et al. (SIGIR Forum, 1999)

The use of phrases from query texts in information retrieval. - Masumi Narita; Yasushi Ogawa (SIGIR, 2000)

Pseudo-frequency method: an efficient document ranking retrieval method for n-gram indexing. - Yasushi Ogawa (SIGIR, 2000)

RICOH at NTCIR-2. - Yasushi Ogawa; Hiroko Mano (NTCIR, 2001)

Selecting Expansion Terms in Automatic Query Expansion. - Hiroko Mano; Yasushi Ogawa (SIGIR, 2001)

RICOH at TREC-10: Web Track Ad-hoc Task. - Hideo Itoh; Hiroko Mano; Yasushi Ogawa (TREC, 2001)

Term Distillation for Cross-DB Retrieval. - Hideo Itoh; Hiroko Mano; Yasushi Ogawa (NTCIR, 2002)

University of Tokyo/RICOH at NTCIR-3 Web Retrieval Task. - Masashi Toyoda; Masaru Kitsuregawa; Hiroko Mano; Hideo Itoh; Yasushi Ogawa (NTCIR, 2002)

An efficient document retrieval method using n-gram indexing. - Yasushi Ogawa; Toru Matsuda (Syst. Comput. Jpn., 2002)

Ricoh at CLEF 2003. - Yuichi Kojima; Hideo Itoh; Hiroko Mano; Yasushi Ogawa (CLEF, 2003)

Zooming Cross-Media: A Zooming Description Language Coding LOD Control and Media Transition. - Tadashi Araki; Hisashi Miyamori; Mitsuru Minakuchi; Ai Kato; Zoran Stejic; Yasushi Ogawa; Katsumi Tanaka (DEXA, 2005)

TRMeister: A DBMS with High-Performance Full-Text Search Functions. - Tetsuya Ikeda; Hiroko Mano; Hideo Itoh; Hiroshi Takegawa; Takuya Hiraoka; Shiroh Horibe; Yasushi Ogawa (ICDE, 2005)