Kozo Sugiyama

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Kozo Sugiyama
Born(1945-09-17)September 17, 1945
DiedJune 10, 2011(2011-06-10) (aged 65)
Alma materNagoya University
Scientific career
FieldsComputer science
InstitutionsJapan Advanced Institute of Science and Technology

Kozo Sugiyama (杉山 公造, Sugiyama Kōzō, September 17, 1945 – June 10, 2011) was a Japanese computer scientist and graph drawing researcher.


Sugiyama was born on September 17, 1945 in Gifu Prefecture, Japan. He did both his undergraduate and graduate studies at Nagoya University, earning a doctorate in 1974. He then worked for Fujitsu until 1997, when he became a professor at the Japan Advanced Institute of Science and Technology. At JAIST, he became a center director in 1998, dean in 2000, and vice president in 2008. He died on June 10, 2011.[1][2]

In the 1990s, Sugiyama also served as one of the directors of the Information Processing Society of Japan.[2]


Sugiyama is best known for his work with Tagawa and Toda introducing layered graph drawing, now also known as Sugiyama-style graph drawing.[2][3] Sugiyama also wrote highly cited papers on other topics in graph drawing including maintenance of the "mental map" when a drawing is modified,[4] drawings that simultaneously display both the adjacencies between vertices in a graph and a hierarchical structure on the same vertices,[5] and the control of edge orientations in force-based algorithms.[6]


Sugiyama was the author of several books on graph drawing and knowledge engineering.[7] His book Graph drawing and applications for software and knowledge engineers (World Scientific, Series on Software Engineering and Knowledge Engineering, Vol. 11, 2002, ISBN 978-981-02-4879-6) is a translation into English of a 1992 Japanese book that was the first book in any language on the subject of graph drawing.[2] His book Knowledge Science (with Atsushi Shimojima and Akiya Nagata) was also translated into Korean (BADA Publishing, 2005).


  1. ^ Curriculum vitae from JAIST, retrieved 2011-09-25.
  2. ^ a b c d Eades, Peter; Hong, Seok-Hee; Misue, Kazuo (2011), "Kozo Sugiyama 1945–2011", 19th International Symposium on Graph Drawing, p. 1.
  3. ^ Sugiyama, Kozo; Tagawa, Shōjirō; Toda, Mitsuhiko (1981), "Methods for visual understanding of hierarchical system structures", IEEE Transactions on Systems, Man, and Cybernetics, SMC-11 (2): 109–125, doi:10.1109/TSMC.1981.4308636, MR 0611436.
  4. ^ Misue, Kazuo; Eades, Peter; Lai, Wei; Sugiyama, Kozo (1995), "Layout adjustment and the mental map", Journal of Visual Languages & Computing, 6 (2): 183–210, doi:10.1006/jvlc.1995.1010.
  5. ^ Sugiyama, Kozo; Misue, Kazuo (1991), "Visualization of structural information: automatic drawing of compound digraphs", IEEE Transactions on Systems, Man and Cybernetics, 21 (4): 876–892, doi:10.1109/21.108304.
  6. ^ Sugiyama, Kozo; Misue, Kazuo (1995), "Graph drawing by the magnetic spring model", Journal of Visual Languages & Computing, 6 (3): 217–231, doi:10.1006/jvlc.1995.1013. A preliminary version of this paper was published as Sugiyama, Kozo; Misue, Kazuo, "A simple and unified method for drawing graphs: Magnetic-spring algorithm", Graph Drawing, DIMACS International Workshop, GD '94, Princeton, New Jersey, Lecture Notes in Computer Science, 894, Springer-Verlag, pp. 364–375, doi:10.1007/3-540-58950-3_391.
  7. ^ List of books from Sugiyama's JAIST web site, retrieved 2011-09-25.