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The second president: Late Toshiharu Hasegawa

Toshiharu Hasegawa


  • Bachelor of Engineering, Master of Engineering, Doctor of Engineering, Osaka University, Master of Science in Engineering, Johns Hopkins University
  • Professor Emeritus, Kyoto University, Former Dean, School of Mathematics and Information Sciences, Nanzan University, Former President, Japan Operations Research Society; former Vice President, International Federation of Operational Research Societies (IFORS), Former Branch Manager, Japan Branch, Information Systems Society (NAIS)


I have studied "communication engineering", "operations research", "road traffic control", etc.Research on "Communication Engineering" began in the early 1960s with a proposal for a multimedia communication system using asynchronous time division multiplexing.At the time when the former Wireline Telecommunications Law was in effect, it ended not receiving much attention, but retrospectively, I realized that my train of thought was not so wrong and gained confidence.

After I was transferred to the Planning Engineering Course at Kyoto University, I became familiar with "operations research" and got an opportunity to get involved in the reality of "road traffic control" as an application field. This brought me an important experience. Instead of controlling a car on the road, I came to believe that we should think about what kind of road-related information we should provide to the human drivers to help them make their decisions.We have come to understand that "Road Traffic Control" systems are clearly interactive information systems that include humans.

For more than 40 years, I had the privilege of studying at the "road traffic control" of toll expressways mainly in cities. As for people of our generation who have studied communications engineering, I think that we had mainly relied on mathematical models. In a sense, we've been thinking about systems that was missing the human factors. Needless to say, the benefits of relying on mathematical models must be taken into account as well. It is especially important to make the structure of the model and its basic position clear to others. You can uncover the logical structure under an axiomatic system. The question is how to include the human factors in that model. When this becomes possible, we gain new insights. As a method for this, for example, the system dynamics method is considered to be effective as an established method.

Studying and researching at The Kyoto College of Graduate Studies for Informatics will certainly broaden our horizons. I'm sure we can open up a new horizon.

Field of Specialization

  • Operations Research
  • System Engineering
  • Communication System
  • Road Traffic Control

Business Performance


  • Real Time Programming 1981, Pergamon Press, Sep. 1981
  • Computer Networking and Performance Evaluation, North-Holland, 1985
  • Control Transportation Systems (1986), Pergamon Press, 1986
  • Performance of Distributed and Parallel Systems, North-Holland, Apr. 1989
  • Local and Metropolitan Communication Systems, Vol.3, Chapman and Hall, Apr. 1996

Academic Paper

  • Entropy of Japanese Telegram, Metrology, Mathematical Linguistics (3), Vol. 1, No. 3, Oct. 1957 1957
  • Digital Data Dynamic Transmission Systems, IEEE Transactions on Communication Technology, Vol.COM-12, No.3, Sep. 1964
  • Ternary logic circuits using tunnel diodes, Journal of the Japan Society of Telecommunications, Vol. 47, No. 10, Oct. 1964 1964
  • Transmission Delay and Channel Loading in Digital Data Dynamic Transmission Systems, IEEE Transactions on Communication Technology, Vol.COM-14, No.2, Apr. 1966
  • Tri-Stable Circuits Using FETs, IEICE Journal, Vol. 51 – C, No. 11, Nov. 1968 1968
  • Analysis of Impact of Network Delay on Multiversion Conservative Timestamp Algorithms in DDBS, Performance Evaluation, Vol.26, Dec. 1996
  • Analysis of Latency in Gated M [x]/G/1 Systems According to Random Processing Rules, Journal of the Operations Research Society of Japan, Vol. 39, No. 4, Dec. 1998 1998
  • “The Traffic-Control System on the Hanshin Expressway”, Interfaces, International Journal of the Institute for Operations Research and Management Sciences, Vol.36, No.1, Jan-Feb 1995
  • “An OR/MS Approach to Managing Nanzan Gakuen (Nanzan Educational Complex): From the Strategic to the Daily Operational Level”, Interfaces, International Journal of the Institute for Operations Research and Management Sciences, Vol.36, No.1, Jan-Feb. 2006
  • Accumu | Kyoto Computer Gakuin Alumni Association bulletin