Contact Information

Hironobu Takagi
Senior Technical Staff Member, IBM Research - Tokyo
Toyosu, Tokyo, Japan


  • Leading accessibility research group at IBM Research - Tokyo
  • Originator of the ACTF aDesigner.
  • ACM Transactions on Accessible Computing (TACCESS) - Editorial board member

Twitter - hirotakagi

Awards

Books

  • Asakawa, C. and Takagi, H. Transcoding. A Chapter In Web Accessibility: A Foundation for Research, Simon Harper and Yeliz Yesilada. pp. 231-261, 2008.
  • Asakawa, C. and Takagi, H. Text Entry for People with Visual Impairments. In TEXT ENTRY SYSTEMS, Scott MacKenzie, I. and Tanaka-Ishii, K., Ed. Morgan Kaufmann. pp. 305-318, 2006.
  • Borodin, Y, Kawanaka, S., Takagi, H., Kobayashi, M., Sato, D., & Asakawa, C. (2010). Social Accessibility. No Code Required: Giving Users Tools to Transform the Web (p. 347). Morgan Kaufmann.
  • Takagi, H. (2011a). Technologies for Full-text Digitization. Modern Library. (in Japanese)
  • Takagi, H. (2011b). Information accessibility during emergencies. ProVision, (70), 60-65. IBM Japan. (in Japanese)

Papers

  • Masatomo Kobayashi, Tatsuya Ishihara, Toshinari Itoko, Hironobu Takagi, and Chieko Asakawa. 2013. Age-Based task specialization for crowdsourced proofreading. In Proceedings of the 7th international conference on Universal Access in Human-Computer Interaction: user and context diversity - Volume 2 (UAHCI'13), Constantine Stephanidis and Margherita Antona (Eds.), Vol. 2. Springer-Verlag, Berlin, Heidelberg, 104-112.
  • Tatsuya Ishihara, Masatomo Kobayashi, Hironobu Takagi, and Chieko Asakawa. 2013. How unfamiliar words in smartphone manuals affect senior citizens. In Proceedings of the 7th international conference on Universal Access in Human-Computer Interaction: applications and services for quality of life - Volume Part III (UAHCI'13), Constantine Stephanidis and Margherita Antona (Eds.), Vol. Part III. Springer-Verlag, Berlin, Heidelberg, 636-642.
  • Hironobu Takagi, Akihiro Kosugi, Shin Saito, and Masayoshi Teraguchi. 2013. Crowdsourcing platform for workplace accessibility. In Proceedings of the 10th International Cross-Disciplinary Conference on Web Accessibility (W4A '13). ACM, New York, NY, USA, , Article 28 , 4 pages.
  • Susumu Harada, Daisuke Sato, Dustin W. Adams, Sri Kurniawan, Hironobu Takagi, and Chieko Asakawa. 2013. Accessible photo album: enhancing the photo sharing experience for people with visual impairment. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13). ACM, New York, NY, USA, 2127-2136.
  • Tatsuya Ishihara, Toshinari Itoko, Daisuke Sato, Asaf Tzadok, and Hironobu Takagi. 2012. Transforming Japanese archives into accessible digital books. In Proceedings of the 12th ACM/IEEE-CS joint conference on Digital Libraries (JCDL '12). ACM, New York, NY, USA, 91-100.
  • Harada, S., Takagi, H., & Asakawa, C. (2011). On the audio representation of radial direction. CHI ’h11: Proceedings of the 2011 annual conference on Human factors in computing systems (pp. 2779-2788). New York, NY, USA: ACM.
  • Sato, D., Kobayashi, M., Takagi, H., Asakawa, C., & Tanaka, J. (2011). How voice augmentation supports elderly web users. The proceedings of the 13th international ACM SIGACCESS conference on Computers and accessibility (pp. 155-162). New York, NY, USA: ACM.
  • Sato, D., Zhu, S., Kobayashi, M., Takagi, H., & Asakawa, C. (2011). Sasayaki: augmented voice Web browsing experience. CHI ’11: Proceedings of the 2011 annual conference on Human factors in computing systems (pp. 2769-2778). New York, NY, USA: ACM.
  • Kobayashi, M., Nagano, T., Fukuda, K., & Takagi, H. (2010). Describing online videos with text-to-speech narration. Proceedings of the 2010 International Cross Disciplinary Conference on Web Accessibility (W4A) (pp. 1-2). New York, NY, USA: ACM.
  • Kobayashi, M., O’Connell, T., Gould, B., Takagi, H., & Asakawa, C. (2010). Are synthesized video descriptions acceptable? ASSETS ’10: Proceedings of the 12th international ACM SIGACCESS conference on Computers and accessibility (pp. 163-170). New York, NY, USA: ACM.
  • Sato, D., Kobayashi, M., Takagi, H., & Asakawa, C. (2010). Social accessibility: the challenge of improving web accessibility through collaboration. Proceedings of the 2010 International Cross Disciplinary Conference on Web Accessibility (W4A) (pp. 1-2). New York, NY, USA: ACM.
  • Sato, D., Takagi, H., Kobayashi, M., Kawanaka, S., & Asakawa, C. (2010). Exploratory Analysis of Collaborative Web Accessibility Improvement. ACM Trans. Access. Comput., 3(2), 5. New York, NY, USA: ACM.
  • Zhu, S., Sato, D., Takagi, H., & Asakawa, C. (2010). Sasayaki: an augmented voice-based web browsing experience. ASSETS 10: Proceedings of the 12th international ACM SIGACCESS conference on Computers and accessibility (pp. 279-280). New York, NY, USA: ACM.
  • Kawanaka, S., Kobayashi, M., Takagi, H., & Asakawa, C. (2009). Accessibility commons: a metadata repository for web accessibility. ACM SIGWEB Newsletter, (Summer), 1-7. New York, NY, USA: ACM.
  • Kobayashi, M., Fukuda, K., Takagi, H., & Asakawa, C. (2009). Providing synthesized audio description for online videos. Assets ’09: Proceedings of the 11th international ACM SIGACCESS conference on Computers and accessibility (pp. 249-250). New York, NY, USA: ACM.
  • Sato, D., Kobayashi, M., Takagi, H., & Asakawa, C. (2009). What’s Next? A Visual Editor for Correcting Reading Order. INTERACT ’09: Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction (pp. 364-377). Berlin, Heidelberg: Springer.
  • Takagi, H., Kawanaka, S., Kobayashi, M., Sato, D., & Asakawa, C. (2009). Collaborative web accessibility improvement: challenges and possibilities. Assets 09: Proceedings of the 11th international ACM SIGACCESS conference on Computers and accessibility (pp. 195-202). New York, NY, USA: ACM.
  • Kawanaka, S., Borodin, Y., Bigham, J. P., Lunn, D., Takagi, H., & Asakawa, C. (2008). Accessibility commons: a metadata infrastructure for web accessibility. Proceedings of the 10th international ACM SIGACCESS conference on Computers and accessibility (pp. 153-160). New York, NY, USA: ACM.
  • Takagi, H., Kawanaka, S., Kobayashi, M., Itoh, T., & Asakawa, C. (2008). Social accessibility: achieving accessibility through collaborative metadata authoring. Assets 08: Proceedings of the 10th international ACM SIGACCESS conference on Computers and accessibility (pp. 193-200). New York, NY, USA: ACM.
  • Miyashita, H., Sato, D., Takagi, H., & Asakawa, C. (2007a). Making multimedia content accessible for screen reader users. Proceedings of the 2007 international cross-disciplinary conference on Web accessibility (W4A) (pp. 126-127). New York, NY, USA: ACM.
  • Miyashita, H., Sato, D., Takagi, H., & Asakawa, C. (2007b). Aibrowser for multimedia: introducing multimedia content accessibility for visually impaired users. Assets 07: Proceedings of the 9th international ACM SIGACCESS conference on Computers and accessibility (pp. 91-98). New York, NY, USA: ACM.
  • Miyashita, H., Takagi, H., Sato, D., & Asakawa, C. (2007). Making multimedia internet content accessible and usable. UAHCI 07: Proceedings of the 4th international conference on Universal access in human-computer interaction (pp. 98-107). Berlin, Heidelberg: Springer.
  • Asakawa, C, & Takagi, H. (2007). Text Entry for People with Visual Impairments. Text Entry Systems: Mobility, Accessibility, Universality (p. 133).
  • Asakawa, C., Itoh, T., Takagi, H., & Miyashita, H. (2007). Accessibility evaluation for multimedia content. Universal Access in Human-Computer Interaction. Applications and Services (pp. 11-19). Berlin, Heidelberg: Springer.
  • Sato, D., Miyashita, H., Takagi, H., & Asakawa, C. (2007). Automatic accessibility transcoding for flash content. Assets 07: Proceedings of the 9th international ACM SIGACCESS conference on Computers and accessibility (pp. 35-42). New York, NY, USA: ACM.
  • Takagi, H., & Ishihara, T. (2007). Technology advances and standardization toward accessible business graphics. UAHCI 07: Proceedings of the 4th international conference on Universal access in human-computer interaction (pp. 426-435). Berlin, Heidelberg: Springer.
  • Takagi, H., Saito, S., Fukuda, K., & Asakawa, C. (2007). Analysis of navigability of Web applications for improving blind usability. ACM Transactions on Computer-Human Interaction (TOCHI), 14(3), 13. New York, NY, USA: ACM.
  • Fukuda, K., Takagi, H., Maeda, J., Saito, S., & Asakawa, C. (2006). Web Accessibility Visualization and Evaluation Tool: aDesigner. Journal of Computer Software, 26-35.
  • Ishihara, T., Takagi, H., Itoh, T., & Asakawa, C. (2006). Analyzing visual layout for a non-visual presentation-document interface. Proceedings of the 8th international ACM SIGACCESS conference on Computers and accessibility (pp. 165-172). New York, NY, USA: ACM.
  • Saito, S., Takagi, H., & Asakawa, C. (2006). Transforming flash to XML for accessibility evaluations. Proceedings of the 8th international ACM SIGACCESS conference on Computers and accessibility (pp. 157-164). New York, NY, USA: ACM.
  • Sato, D., Takagi, H., & Asakawa, C. (2006). Accessibility evaluation based on machine learning technique. Proceedings of the 8th international ACM SIGACCESS conference on Computers and accessibility (pp. 253-254). New York, NY, USA: ACM.
  • Asakawa, C, Takagi, H., Ino, S., & Ifukube, T. (2005). The optimal and maximum listening rates in presenting speech information to the blind. Journal of Human Interface Society, 7(1), 105-111.
  • Fukuda, K., Saito, S., Takagi, H., & Asakawa, C. (2005). Proposing new metrics to evaluate web usability for the blind. CHI’05 extended abstracts on Human factors in computing systems (pp. 1387-1390). New York, NY, USA: ACM.
  • Ishihara, T., Takagi, H., Ito, T., & Asakawa, C. (2005). A Method to add meta-information to presentation documents for recognizing the structure of the documents. IEIC Technical Report (Institute of Electronics, Information and Communication Engineers), 105(371), 1-6.
  • Asakawa, C, Takagi, H., Ino, S., & Ifukube, T. (2004). TAJODA: Proposed tactile and jog dial interface for the blind. IEICE TRANSACTIONS on Information and Systems, 87(6), 1405-1414.
  • Maeda, J., Fukuda, K., Takagi, H., & Asakawa, C. (2004). Web accessibility technology at the IBM Tokyo research laboratory. IBM journal of research and development, 48(5/6), 735-749. Riverton, NJ, USA: IBM Corp.
  • Takagi, H., Asakawa, C., Fukuda, K., & Maeda, J. (2004). Accessibility designer: visualizing usability for the blind. Assets 04: Proceedings of the 6th international ACM SIGACCESS conference on Computers and accessibility (pp. 177-184). New York, NY, USA: ACM.
  • Asakawa, C, Takagi, H., Ino, S., & Ifukube, T. (2003). Maximum listening speeds for the blind. Proc. of ICAD (International Conference for Auditory Displays)
  • Fukuda, K., Takagi, H., Maeda, J., & Asakawa, C. (2003). An assist method for realizing a Web page structure for blind people. Proceedings of UAHCI (Universal Access in HCI), 3.
  • Maeda, J., Fukuda, K., Takagi, H., & Asakawa, C. (2003). Presentation-based Web Accessibility Evaluation System. IEIC Technical Report (Institute of Electronics, Information and Communication Engineers), 103(401), 47-52.
  • Maeda, J., Fukuda, K., Takagi, H., & Asakawa, C. (2003). WebDigest: layout-preserving visually enhanced Web pages. SAINT 03: Proceedings of the 2003 Symposium on Applications and the Internet (pp. 418-421). Washington, DC, USA: IEEE Computer Society.
  • Asakawa, C, Takagi, H., Ino, S., & Ifukube, T. (2002). The Highest and the Most Suitable Listening Rate for the Blind in the Screen Reading Process. Proc. Human Interface Symposium, 543-546.
  • Asakawa, C., Takagi, H., Ino, S., & Ifukube, T. (2002). Auditory and tactile interfaces for representing the visual effects on the web. Proceedings of the fifth international ACM conference on Assistive technologies (pp. 65-72). New York, NY, USA: ACM.
  • Maeda, J., Fukuda, K., Takagi, H., & Asakawa, C. (2002). Evaluation of Web Digesting Tecnique. IEIC Technical Report (Institute of Electronics, Information and Communication Engineers), 102(318), 1-6.
  • Takagi, H., Asakawa, C., Fukuda, K., & Maeda, J. (2002). Site-wide annotation: reconstructing existing pages to be accessible. Proceedings of the fifth international ACM conference on Assistive technologies (pp. 81-88). New York, NY, USA: ACM.
  • Fukuda, K., Takagi, H., Maeda, J., & Asakawa, C. (2001a). Web Contents Transcoding System for Improvement of Accessibility. IEIC Technical Report (Institute of Electronics, Information and Communication Engineers), 101(263), 31-36.
  • Fukuda, K., Takagi, H., Maeda, J., & Asakawa, C. (2001b). Common layout extraction from Web pages. Information Processing Society of Japan (IPSJ) Technical Report, 2001(52), 7-14. (in Japanese)
  • Maeda, J., Takagi, H., Fukuda, K., & Asakawa, C. (2001). Web digesting technique based on annotations. IEIC Technical Report (Institute of Electronics, Information and Communication Engineers), 101(263), 25-30.
  • Sakairi, T., & Takagi, H. (2001). An annotation editor for nonvisual Web access. Proceedings of the 9th International Conference on Human-Computer Interaction (HCI International 2001), 982-985.
  • Asakawa, C., & Takagi, H. (2000). Annotation-based transcoding for nonvisual web access. Proceedings of the fourth international ACM conference on Assistive technologies (pp. 172-179). New York, NY, USA: ACM.
  • Takagi H. (2000). Recognizing Users’ Uncertainty on the Basis of Eye Movement Patterns: A Step toward an Effective Task Assistance System (Special Issue on New Aspects of Environment for Computer and Human Interaction). IPSJ Journal, 41(5), 1317-1327. Information Processing Society of Japan (IPSJ).
  • Takagi, H., & Asakawa, C. (2000). Transcoding proxy for nonvisual web access. Assets 00: Proceedings of the fourth international ACM conference on Assistive technologies (pp. 172-179). New York, NY, USA: ACM.
  • Takagi, H. (1999). New Aspects of Environment for Computer and Human Interaction. Recognizing Users’ Uncertainty on the Basis of Eye Movement Patterns. A Step toward an Effective Task Assistance System. PUI Conference (Vol. 41, pp. 1317-1327).
  • Takagi, H. (1998). Development of an eye-movement enhanced translation support system. Computer Human Interaction, 1998. Proceedings. 3rd Asia Pacific (pp. 114-119).