J-GLOBAL         Last updated: Sep 11, 2016 at 11:05
Hiroshi Maruyama
Preferred.Networks, Inc.
Job title
Chief Strategy Officer
Dr. Engineering(Kyoto University)
Other affiliation
The Institute of Statistical MathematicsShizuoka University
Twitter ID


Dr. Hiroshi Maruyama has spent 26 years in IBM Research, Tokyo Research Laboratory, working on various computer science areas such as artificial intelligence, natural language processing, machine translation, hand-writing recognition, multimedia, XML, Web Services, and security. He was the director of IBM Tokyo Research Laboratory from 2006 to 2009. From 2011 to 2016, he was a professor at the Institute of Statistical Mathematics where he worked on two projects -- Systems Resilience and Data Scientist Training Network, among other research activities related to statistics and computer science.He joined Preferred Networks, Inc. in April 2016 as the chief strategy officer.

Research Areas


Academic & Professional Experience

Apr 2011
Professor, The Institute of Statistical Mathematics
Nov 2009
Sep 2010
Deputy Group Executive, Digital Platform Development HQ, Canon, Inc.
Apr 1983
Apr 2009
IBM Research, Tokyo Research Laboratory
Jul 1997
Mar 2000
Adjunct Associate Professor, Dept. of Computer Science, Tokyo Institute of Technology


Apr 1981
Mar 1983
MS, Dept. of Information Science, Tokyo Institute of Technology

Published Papers

Lect Notes Comput Sci   5017 13-16   2008
Lect Notes Comput Sci   4189 65-80   2006
Hiroshi Maruyama
Since the Japanese language does not have explicit word boundaries, dictionary lookup should be done, in principle, for all possible substrings
Hiroshi Maruyama, Hideo Watanabe, Shiho Ogino
In this paper, we describe a working system for interactive Japanese syntactic anMysis. A human 'user can intervene during parsing to help the sys- ,em to produce. a correct parse tree. Human inl, eractions are limited to the very simple task of h...
Hiroshi Maruyama
We present a new grammatical formalism called Constraint Dependency Grammar (CDG) in which every grammatical rule is given as a constraint on wordto -word modifications. CDG parsing is formalized as a constraint satisfaction problem over a finite ...
Krishna Nathan, Homayoon S. M. Beigi, Jayashree Subrahmonia, Gregory J. Clary, Hiroshi Maruyama
We address the problem of automatic recognition of unconstrained handwritten text. Statistical methods, such as hidden Markov models (HMMs) have been used successfully for speech recognition and they have recently been applied to the problem of ha...
Hiroshi Maruyama, Shiho Ogino, Masaru Hidano
Large corpora with part-of-speech tagging play a very important role in recent statisticsbased and example-based natural language processing systems. However, no such corpora have become widely available for Japanese so far. Because the Japanese l...
Takeshi Imamura, Hiroshi Maruyama
Abstract Syntax Notation One (ASN.1) is a framework for representing tree structured data. It is widely used in communication protocols (e.g., LDAP), security protocols (e.g., X.509), and so on. ASN.1 is designed for e ciency and the data is packe...
Towards Systems Resilience
Maruyama, Hiroshi 統計数理研究所, Minami, Kazuhiro 統計数理研究所
Innovation and Supply Chain Management   7 3   Sep 2013   [Refereed]


Rungsiman Nararatwong, Rungsiman Nararatwong, Roberto Legaspi, Hitoshi Okada, Hiroshi Maruyama
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   9021 153-162   Jan 2015
© Springer International Publishing Switzerland 2015. Marketers have devoted their efforts to comprehend the essence of negative electronic word-of-mouth (eWOM) since it was first introduced to understand brand crisis and the fact that social medi...
Roberto Legaspi, Hiroshi Maruyama, Rungsiman Nararatwong, Hitoshi Okada
Proceedings - 4th IEEE International Conference on Big Data and Cloud Computing, BDCloud 2014 with the 7th IEEE International Conference on Social Computing and Networking, SocialCom 2014 and the 4th International Conference on Sustainable Computing and C   547-554   Jan 2015
© 2014 IEEE. Resilience is the capacity of a system to withstand large disturbances and dramatically changing conditions without losing its core purpose and integrity and achieve generalized recovery once failure happens. Due to the many dimension...
Nana Arizumi, Kazuhiro Minami, Tomoya Tanjo, Hiroshi Maruyama, Daisuke Murakami, Yoshiki Yamagata
2014 7th International Conference on Information and Automation for Sustainability: "Sharpening the Future with Sustainable Technology", ICIAfS 2014      Jan 2014
© 2014 IEEE. We study a graph partitioning problem for electrical grids such that a given grid is partitioned into multiple ones that are self-contained concerning electricity balance. Our goal is to find a resilient partition against time-changin...
Tomoya Tanjo, Kazuhiro Minami, Ken Mano, Hiroshi Maruyama
Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications   5 63-78   Jan 2014
© 2014, Innovative Information Science and Technology Research Group. All rights reserved. Pseudonymization is an effective way to publish a location dataset with trajectory information in a privacy-preserving way. We previously proposed a techniq...
Kazuhiro Minami, Roberto Legaspi, Tomoya Tanjo, Hiroshi Maruyama, Yoshiki Yamagata
Proceedings of the 2014 International Conference and Utility Exhibition on Green Energy for Sustainable Development, ICUE 2014      Jan 2014
Resilience to a disruptive change in the ecological system is an essential property that makes our society sustainable. There seems to be a consensus among many researchers in various disciplines that diversity and adaptability are two of the key ...

Books etc

Hiroshi Maruyama, Kent Tamura, Naohiko Uramoto, Makoto Murata, Andy Clark, Yuichi Nakamura, Ryo Neyama, Kazuya Kosaka, Satoshi Hada (Part:Joint Work)
Addison-Wesley Professional   May 2002   ISBN:0201770040
Hiroshi Maruyama, Maruyama, Tamura (Part:Joint Work)
Prentice Hall   Nov 2001   ISBN:8483222426
Hiroshi Maruyama
Addison-Wesley Pub (Sd)   Apr 2001   ISBN:0201616114

Conference Activities & Talks

Towards Systems Resilience
IBM Research Colloquium on Societal Resilience   13 Oct 2011   
Resilience Engineering: State of the Art and Research Challenges.
5 Sep 2012   
Formalizing the Resilience of Open Dynamic Systems
Joint Agent Workshop and Symposium (JAWS)   24 Oct 2012   
Protecting Location Privacy with K-Confusing Paths Based on Dynamic Pseudonyms
5th IEEE International Workshop on SEcurity and SOCial Networking (SESOC)   18 Mar 2013   
Systems resilience: a challenge problem for dynamic constraint-based agent systems
the 12th International Conference on Autonomous Agents and Multiagent Systems (AAMAS),   6 May 2013