Profile

Modified on March 31, 2018

Contact

E-mail:

Profile

Name
Kentaro IMAJO (今城 健太郎)
Title
Engineer
Affiliation
Preferred Networks, Inc.
Education
  • Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Japan, April 2011 to present
  • School of Engineering Science, Osaka University, Japan, April 2007 - March 2011
Work Experience
  • Engineer, Preferred Networks Inc., February 2018 to present
  • Software Engineer, Google Inc., April 2013 to February 2018
  • Director, AtCoder Inc., May 2012 to March 2013
  • Internship, Japan, Google Inc., August 2011 - October 2011
  • Part-time Programmer, Atfreaks Ltd., September 2005 to March 2013
  • Part-time Programmer, AAA Communications Ltd., April 2002 - August 2004
Honors & Awards
  • ICFP Programming Contest, the 1st place, September 2022.
  • ICFP Programming Contest, the 2nd place, September 2021.
  • ICFP Programming Contest, the 2nd place, September 2020.
  • ICFP Programming Contest, the 1st place, September 2019.
  • ICFP Programming Contest, the 1st place, September 2018.
  • ICFP Programming Contest, the 5th place, September 2017.
  • ICFP Programming Contest, the 1st place, September 2016.
  • ICFP Programming Contest, the 1st place, September 2015.
  • ICFP Programming Contest, the 2nd place, September 2014.
  • ICFP Programming Contest, the 1st place, September 2013.
  • ACM/ICPC World Finals 2012, an 18th place tie, May 2012.
  • ACM/ICPC Asia Regional Contest in Hsinchu, Taiwan, the 3rd place, November 2011.
  • ACM/ICPC Asia Regional Contest in Fukuoka, Japan, the 5th place, November 2011.
  • ICFP Programming Contest, the 2nd place, September 2011.
  • ACM/ICPC Asia Regional Contest in Tokyo, Japan, the 8th place, December 2010.
  • ACM/ICPC Asia Regional Contest in Tokyo, Japan, the 8th place, November 2009.
  • ACM/ICPC Asia Regional Contest in Aizu, Japan, the 10th place, October 2008.
  • The 18th International Olympiad in Informatics, Bronze, August 2006.

Publication

Journals

  • Shota Imaki, Kentaro Imajo, Katsuya Ito, Kentaro Minami, Kei Nakagawa, "No-Transaction Band Network: A Neural Network Architecture for Efficient Deep Hedging," The Journal of Financial Data Science 5(2), 84―99, 2023.
  • Liu Ziyin, Katsuya Ito, Kentaro Imajo, Kentaro Minami, "Power laws and symmetries in a minimal model of financial market economy," Physical Review Research 4(3), 033077, 2022.
  • Mahito Sugiyama, Kentaro Imajo, Keisuke Otaki, Akihiro Yamamoto, "Semi-Supervised Ligand Finding Using Formal Concept Analysis," IPSJ Transactions on Mathematical Modeling and Its Applications 5(2), 39―48, 2012.
  • Kentaro Imajo, "Contest Environment Using Wireless Networks: A Case Study From Japan," Olympiad in Informatics 5, 26―31, 2011.

International Conference (Selected)

  • Liu Ziyin, Kentaro Minami, Kentaro Imajo, "Theoretically Motivated Data Augmentation and Regularization for Portfolio Construction," Proceedings of the Third ACM International Conference on AI in Finance, 273―281, 2022.
  • Yugo Fujimoto, Kei Nakagawa, Kentaro Imajo, Kentaro Minami, "Uncertainty Aware Trader-Company Method: Interpretable Stock Price Prediction Capturing Uncertainty," 2022 IEEE International Conference on Big Data (Big Data), 1238―1245, 2022.
  • Kentaro Imajo, Kentaro Minami, Katsuya Ito, Kei Nakagawa, "Deep portfolio optimization via distributional prediction of residual factors," Proceedings of the AAAI conference on artificial intelligence 35(1), 213―222, 2021.
  • Katsuya Ito, Kentaro Minami, Kentaro Imajo, Kei Nakagawa, "Trader-Company Method: A Metaheuristics for Interpretable Stock Price Prediction," Proceedings of the 20th International Conference on Autonomous Agents and MultiAgent Systems, 656―664, 2021.
  • Kentaro Imajo, Otaki Keisuke, Yamamoto Akihiro, "Binary Classification Using Fast Gaussian Filtering Algorithm," Algorithms for Large-Scale Information Processing in Knowledge Discovery, 2012.
  • Kentaro Imajo, "Fast Gaussian Filtering Algorithm Using Splines," The 21st International Conference on Pattern Recognition, 2012.
  • Takuya Akiba, Kentaro Imajo, Daisuke Okanohara, "Engineering Parallel String Sorting Algorithms," Algorithms for Large-Scale Information Processing in Knowledge Discovery, 2011.

International Conference

  • Mahito Sugiyama, Kentaro Imajo, Keisuke Otaki, Akihiro Yamamoto, "Discovering Ligands for TRP Ion Channels Using Formal Concept Analysis," The 21st International Conference on Inductive Logic Programming, 2011.

Workshop

  • Kentaro Imajo, Go Hasegawa, Yoshiaki Taniguchi, Hirotaka Nakano, "Short-term Precipitation Forecasting Using an Optical Flow Algorithm," IEICE Technical Report 110(455), 93-98, 2011.
  • Kentaro Imajo, "Computation for the Fast Continuous Wavelet Transform," JSIAM, 375-376, 2009.

Educational Career

Olympiad in Informatics

  • Tutor, Spring Training Camps of Japanese Olympiad in Informatics, 2007-2011.
  • Tutor, Summer Seminar of Japanese Olympiad in Informatics, 2007-2011.
  • A member of the Japanese Delegates, the 23rd International Olympiad in Informatics in Thailand, July 2011.
  • A member of the Japanese Delegates, the 22nd International Olympiad in Informatics in Canada, August 2011.
  • A member of the Host Scientific Committee, the 21st International Olympiad in Informatics in Bulgaria, August 2009. (My proposed task was adopted among candidates.)

Others

  • Publicity and Logistics, Machine Learning Summer School, 2012.
  • Tutor, Supercomputing Contest, 2007-2009.
Last Modified: August 5, 2023