日本語
The University of Electro-Communications 
Graduate School of Informatics and Engineering, School of Informatics and Engineering 
"Department of Computer and Network Engineering, Cluster I (Informatics and Computer Engineering)" 

Professor 
OHMORI Tadashi 

Year of birth:1962  
Personal website  

Career
Graduate School of Informatics and Engineering  Dept. Computer and Network Engineering, Computer Science program  Professor  2016/04/01-Present 
Graduate school of Information Systems  Department of Information System Fundamentals  Professor  2010/04/01-Present 
Graduate School of Information Systems  Dept. Information System Fundamentals  Associate Professor  1994/04-2010/03/31 

Academic background
The University of Tokyo  Graduate School, Division of Engineering  Information Engineering Course  Doctoral program  1990/03  Completed 
The University of Tokyo  Graduate School, Division of Engineering  Information Engineering Course  Master's program  1987/03  Completed 
The University of Tokyo  Faculty of Engineering  Dept. Electrical Engineering  1985/03  Graduated 

Academic degrees
Doctor of Engineering  The University of Tokyo  1990/03 

Outlines of current research
database engineering, new data-platform systems, advanced query processing and data mining from massive data. concurrency and consistency issues for new data-platform systems. 

Classes responsible within the university
2022  Principles of Database Engineering 2  Spring semester  Both graduate schools, IE and IS  Master's and doctoral programs 
2022  Fundamentals of Database Systems  Spring semester  Undergraduate, daytime 
2022  Fundamentals of Algorithms I  Fall semester  Undergraduate, daytime 
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Current research areas
Multimedia database 
Theory of informatics 
Computer system 
Software 

Research keywords
advanced query and database processing algorithms over massive data 
design, algorithms, implementation issues of new data-platform systems 
information extraction from massive data and consistency management as well as index, concurrency, recovery, distributed execution over shared data 
data mining and data-driven applications over massive real-world data 

Current research subjects
advanced query, information extraction, data mining over massive data and database  1987/04-Present 
design and implementation issues for new data-platform systems, consistency and concurrency over shared/distributed database  1990/03-Present 
information extraction and data-driven applications over real-world data collections including spatial/temporal data  information extraction, spatio-temporal data.  2015/04/01-Present  m-closest keyword search over spatial datasets and its extension towards a new spatial search engine.  
simulation of multi-agent systems by using very large database.  1994/04-1998/03 
A Study on a Multi-Dimensional Web-Structure Mining System on a basis of a Multi-Dimensional Data-Cube Model.  2005/04-2012/03 
A Study on Models and Algorithms for Massive Log Data Analysis  data mining and information extraction from massive, heterogeneous sequential datasets.  2005/04-2007/03 
A Study on Keyword Search over Structured Data and Graph Databases  keyword search, hybrid XML-Relational database, Graph database, graph enumeration algorithms  2008/04-2011/03 

Published books
Book, translated  J.Gray, A.Reuter,"Transaction Processing: the concept and techniques", MorganKaufmann Pub.  M.Kitsuregawa, Tadashi Ohmori, and 7 translators  Nikkei BP  277-452  2001 
Book, dictionary  Handbook of Artificial Intelligence  Masaru KITSUREGAWA, Tadashi OHMORI  Japan Society of Artificial Intelligence  1990 
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Published papers
Paper  Yes  Edge Bundling for Zoomable Network Visualization  Joint  K.Akiyama, H.Fujita, T.Ohmori, T.Shintani  IPSJ Journal  63/ 3, 817-830  2022/03 
Paper  Yes  Utilizing Block Partitioning and Hash-Join in L2AP Similarity-Join Method  Joint  R.Yoshimura, T.Ohmori, T.Shintani, H.Fujita  DBSJ Japanese Journal  Vol.17-J/ No.10, (8 pages)-  2019/03 
Paper  Yes  A New Efficient Algorithm for m-Closest Spatial Keyword Search by using Priority Control and Tight Lower-Bound  Joint  Yuan Qiu, Tadashi Ohmori, Takahiko Shintani, Hideyuki Fujita  IEICE Transaction, Vol. D  99-D/ 7, 638-651  2016/07 
Paper  Yes  Skip search approach for mining frequent pattern from uncertain database  Joint  H.Tateshima, T.Shintani, T.Ohmori, H.Fujita  DBSJ Japanese Journal  Vol.14/ Article No.6, 1-7  2016/03  2189-0374 
Paper  Yes  Design and Evaluation of the Database System IDPS-DB on the Intellectual Distributed Processing System IDPS  Shuji HARASHIMA, Tadashi OHMORI  Transactions of IEICE, Japan, Series D.  Vol.J96-D/ No.10, 2274-2285  2013/10 
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Research presentations
Workshop  ネットワーク可視化のための拡大描画に適したエッジバンドリング手法  DEIM 2020 (データ工学と情報技術フォーラム)  H8-1  No  秋山,藤田,大森,新谷  2020/03 
Workshop  An Enhancement of Similarity-Join Algorithm L2AP by using Block Partitioning and Hash Join Techniques  DEIM 2018  I6-2  No  Ryunosuke Yoshimua, Tadashi Ohmori,T.Shintani, H.Fujita  2018/03/05  URL 
Workshop  位置・方向情報付写真群を用いた空間を要約する経路の作成  DEIMフォーラム2016  H5-4  No  相楽翔太,藤田秀之,大森匡,新谷隆彦  2016/03/01 
Workshop  A New Search Strategy for m-Closest Keywords Query by using Dynamically-Created Grid-Partitioning over Spatial Datasets  Int'l Symposium on Cartoraphy in Internet and Ubquitous Environments 2015  P2  Yes  Y.Qiu, H.Zhai, A.H.Dang, T.Ohmori, H.Fujita, T.Shintani  2015/03/18 
Workshop  A New Load-Distribution Algorithm for Efficient Edit-Distance Join on MapReduce  DEIM2015  E7-6  No  Atsuhito KONNO, Tadashi OHMORI, Takahiko SHINTANI  2015/03/03 
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Awards
FIT session award  Embedding Point-Data Score in m-Closest Keyword Search Problem over Spatial Web  2020/09/01 
DEIM2016 優秀プレゼンテーション賞(主指導学生M2)  位置・方向情報付写真群を用いた空間を要約する経路の生成  2016/03/02 
FIT session award  Efficiency improvement of mCK search problem by using recursive DCC strategy  2015/09/14 
Session Presentation Award  A New Load-Distribution Algorithm of Efficient Edit-Distance Join over MapReduce platforms  2015/03/04 
Student presentation award  A new algorithm of m-closest keywords query over spatial data  2014/03/13 
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Grants-in-aid for scientific research
A Research on Efficient Algorithms for Creating information-Spaces on Massive-Data Systems.  "Scientific research (C), general"  2012/04/01-2016/03/31 
A Study on Database Systems for Multi-Dimensional Web Mining  "Scientific research (C), general"  2009/04/01-2012/03/31 
データ管理システムのログデータ分析方式に関する研究  "Scientific research (C), general"  2005/04/01-2007/03/31 
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Past records of joint or funded research
イベントデータの利用技術に関する研究  2001-2001  Research commissioned by a company 
WEBマイニングに関する研究  2001-2001  Funded commissioned research 
イベントログデータの利用技術に関する研究  2002-2002  Research commissioned by a company 
イベントログデータの利用に関する研究  2003-2003  Research commissioned by a company 
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Memberships of academic societies
電子情報通信学会  1987-Present 
情報処理学会  1985-Present 
IEICE Technical Committee of Data Engineering  1987-Present 
ACM SIGMOD Japan Chapter  1998-Present 
ACM  1998-Present 
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Committee or council involvement
DEIM(データ工学と情報マネジメントフォーラム)プログラム委員  DEIMプログラム編成委員  2013/03-2019/03 
ACM SIGMOD Japan chapter  vice chief editor  2011/06-2015/06 
Trans. IEICE of Japan, D division, editors of special issues on data engineering, 2008-2009.  論文誌データ工学特集号編集幹事  2008/05-2010/02 
情報処理学会  データベースシステム研究会論文誌TOD編集委員  2003/04-2011/03 
ACM SIGMOD Japan Chapter  SIGMOD日本支部書記・幹事  1999-2002 
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Committee activity in the University
情報・ネットワーク工学専攻コンピュータサイエンス(CS)プログラム長  プログラム長  2019/04-2020/03 
IS進路委員会・委員長  委員長  2015/12-2016/12 
IS教務委員会・改組対応教務委員会  委員  2015/04-2016/03 
IS教務委員会(改組対応教務委員含む)  委員長(IS側)  2014/04-2015/03 
IS入試委員会  委員長  2013/04-2014/03 
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