OKOSHI Tadashi



Faculty of Environment and Information Studies Computer Science, Mobile Computing, Ubiquitous Computing (Shonan Fujisawa)


Associate Professor

Related Websites

Contact Address

5322 Endo, Fujisawa, Kanagawa, 252-0882 JAPAN

Telephone No.


External Links

Profile 【 Display / hide

  • Tadashi Okoshi is an associate professor in Faculty of Environment and Information Studies, Keio University. He is a computer scientist especially focusing on distributed systems, mobile and ubiquitous computing, context-aware computing etc. His current research topic is "Human Attention Management" and "Computing for Well-being" (WellComp). He holds B.A. in Environmental Information (1998), Master of Media and Governance (2000) from Keio University, M.S. in Computer Science (2006) from Carnegie Mellon University, and Ph.D. in Media and Governance (2015) from Keio University, respectively. He also has over 7 year experiences of entrepreneurship, software architecting, product management, and project management in IT industries (Web2.0, blogging, social networking and social media).

Academic Background 【 Display / hide

  • 1994.04

    Keio University, Faculty of Environmental Information

    University, Graduated

  • 1998.04

    Keio University, Graduate School of Media and Governance

    Graduate School, Completed, Master's course

  • 2001.08

    Carnegie Mellon University, School of Computer Science, CS Department

    United States, Graduate School, Completed, Master's course

  • 2013.04

    Keio University, Graduate School of Media and Governance

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • Master of Media and Governance, Keio University, Coursework, 2000.03

  • M.S. in Computer Science, Carnegie Mellon University, Coursework, 2005.12

  • 博士 (政策・メディア), Keio University, Coursework, 2015.09

    Detection of User's Interruptibility for Attention Awareness in Ubiquitous Computing


Research Areas 【 Display / hide

  • Informatics / Information network (Ubiquitous Computing)

Research Keywords 【 Display / hide

  • Computing for Well-being

  • Human Attention Management


Papers 【 Display / hide

  • Investigating the occurrence of selfie-based emotional contagion over social network.

    Wataru Sasaki, Yuuki Nishiyama, Tadashi Okoshi, Jin Nakazawa

    Soc. Netw. Anal. Min. 11 ( 1 ) 8 - 8 2021

    Research paper (scientific journal), Joint Work

  • NationalMood: Large-scale Estimation of People's Mood from Web Search Query and Mobile Sensor Data

    Tadashi Okoshi

    CoRR abs/2011.00665 2020.11

    Research paper (scientific journal), Single Work

     View Summary

    The ability to estimate current affective statuses of web users has considerable potential towards the realization of user-centric opportune services. However, determining the type of data to be used for such estimation as well as collecting the ground truth of such affective statuses are difficult in the real world situation. We propose a novel way of such estimation based on a combinational use of user's web search queries and mobile sensor data. Our large-scale data analysis with about 11,000,000 users and 100 recent advertisement log revealed (1) the existence of certain class of advertisement to which mood-status-based delivery would be significantly effective, (2) that our "National Mood Score" shows the ups and downs of people's moods in COVID-19 pandemic that inversely correlated to the number of patients, as well as the weekly mood rhythm of people.

  • Element Recognition of Step Sequences in Figure Skating Using Deep Learning Model

    岩田あきほ, 川島寛乃, 大越匡, 中澤仁

    情報処理学会研究報告(Web) 2020 ( CDS-28 )  2020

    Joint Work

  • Mobile Computing-based Emotional Eating Detection

    栄元優作, 佐々木航, 西山勇毅, 大越匡, 中澤仁

    情報処理学会研究報告(Web) 2020 ( MBL-94 )  2020

    Joint Work

  • フットサル動画分析のためのデータ収集システム

    大村昇平, 谷村朋樹, 大越匡, 中澤仁

    情報処理学会研究報告(Web) 2020 ( CDS-28 )  2020

    Joint Work

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Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

  • PerCom Workshops 2018 Committees

    David K., Hübener I., Okoshi T.

    2018 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2018 (2018 IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2018)   2018.10

    ISSN  9781538632277

Research Projects of Competitive Funds, etc. 【 Display / hide

  • A Study on Cyberoceptive Sense towards Augumenting Human's Ability to Estimate Other's Emotions in Cyber Space


    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

  • Behavification: ユーザの注意をバイパスして行動に作用する情報基盤


    Keio University, Grant-in-Aid for Early-Career Scientists, No Setting


Courses Taught 【 Display / hide











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