Yuya Yokoyama

(横山友也)

Profile Information

Affiliation: Associate Professor, Fujita Health University

Degree: Doctor of Philosophy(Mar, 2015, Kyoto Institute of Technology)
Master of Engineering(Mar, 2012, Kyoto Institute of Technology)
Bachelor of Engineering(Mar, 2010, Kyoto Institute of Technology)

Other name(s) (e.g. nickname): Yuya Dan
J-GLOBAL ID: 201801010367085367
researchmap Member ID: B000344701

Research Areas

Research History

Apr, 2026 - Present

Associate Professor, Fujita Health University
Sep, 2023 - Mar, 2026

Assistant Professor, Graduate School of Engineering, Advanced Institute of Industrial Technology
Apr, 2023 - Sep, 2023

Faculty of Life and Environmental Sciences, Kyoto Prefectural University
Apr, 2017 - Sep, 2023

Part-time Lecturer, School of Science and Technology, Kyoto Institute of Technology
May, 2023 - Aug, 2023

Advanced Institute of Industrial Technology

Education

Apr, 2012 - Mar, 2015

Doctoral Program of Engineering Design, Graduate School of Science and Technology Doctoral Programs, Kyoto Institute of Technology
Apr, 2010 - Mar, 2012

Master's Program of Information Science, Graduate School of Science and Technology Master's Programs, Kyoto Institute of Technology
Apr, 2006 - Mar, 2010

Undergraduate Program of Information Science, School of Science and Technology, Kyoto Institute of Technology
Apr, 2003 - Mar, 2006

Takatsuki High School

Committee Memberships

Oct, 2025 - Dec, 2025

Local Arrangement Chair, 19th International Congress on Advanced Applied Informatics (IAAI) AAI2025-winter
Jun, 2025 - Jul, 2025

Local Arrangement Chair, 18th International Congress on Advanced Applied Informatics (IAAI) AAI 2025
Apr, 2025 - Jul, 2025

SNPD 2025-Summer II Registration Chair/Special Session (SS2) Organizer, The International Association for Computer and Information Science (ACIS)
Oct, 2024 - Jun, 2025

Registration Chair, International Association for Computer and Information Science (ACIS) SNPD 2025-Summer II
Oct, 2024 - Dec, 2024

Local Arrangement Chair, 17th International Congress on Advanced Applied Informatics (IAAI) AAI2024-winter

Awards

Dec, 2024

Honorable Mention Award, Extracting Factors through Additional Impression Evaluation Experiment Assessing Both High-rated and Low-rated Reviews Posted at EC Sites, 9th International Conference on Knowledge, Information and Creativity Support Systems (KICSS 2024)

Yuya Yokoyama, Takaaki Hosoda, Tokuro Matsuo
Dec, 2023

Honorable Mention Award, Impression and Suitability of Q&A Statements through Factor Scores Using 2-gram, 15th International Congress on Advanced Applied Informatics (AAI 2023-winter) Congress

Yuya Yokoyama
Dec, 2022

Honorable Mention Award, Using 4-gram to Obtain Factor Scores of Japanese Statements Posted at Q&A Sites, 13th International Congress on Advanced Applied Informatics (AAI 2022-winter) Congress

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya
Mar, 2017

11th Annual Spring Meeting of Japan Society of Kansei Engineering Best Presentation Award, Factors Describing Impression of English Question and Answer Statements, Japan Society of Kansei Engineering

YOKOYAMA Yuya

Papers

Observing the Relationships of Factors Between Before Enrollment and After Graduation from a Questionnaire Aimed at General Adult Learners

Yuya Yokoyama, Takaaki Hosoda, Morihiko Ikemizu, Tokuro Matsuo

Studies in Computational Intelligence, 1239 177-191, Feb 23, 2026 Peer-reviewedLead author

Attachment
Determination of Dissaving Risk against Life Expectancy for Elderly People Through Clustering Analysis Applied to Additional Anonymous Data

Yuya Yokoyama

Proc. of the 19th IIAI International Congress on Advanced Applied Informatics (AAI 2025-winter), 43-48, Dec 16, 2025 Peer-reviewedLead author

Attachment
Effects of Career Change Opportunities for Graduates After Graduation from an Educational Institute

Yuya Yokoyama, Takaaki Hosoda, Morihiko Ikemizu, Tokuro Matsuo

IIAI Letters on Institutional Research, 6 1-13, Dec 15, 2025 Peer-reviewedLead author

Attachment
Obtaining Factors of What Was Acquired through Questionnaire Aimed at Graduates of an Educational Institute

Yuya Yokoyama, Takaaki Hosoda, Morihiko Ikemizu, Tokuro Matsuo

18th IIAI International Congress on Advanced Applied Informatics (AAI 2025), 5 1-6, Jul 14, 2025 Peer-reviewedLead author

Attachment
Awareness Changes in Participants in Online Symposiums - Observations from Pre- and Post-Questionnaire Survey Results

Yuya Yokoyama, Tokuro Matsuo, Hidekazu Iwamoto

18th IIAI International Congress on Advanced Applied Informatics (AAI 2025), 5 1-13, Jul 14, 2025 Peer-reviewedLead author

Attachment

Misc.

Estimation of Factor Scores of Q&A Statements Using Syntactic Analysis

Yuya Yokoyama

The 38th Annual Conference of the Japanese Society for Artificial Intelligence, 2p, May 31, 2024 Lead author

Attachment
A Method to Determine DIssaving Risk of Elderly People

Yokoyama Yuya, Yasunari Yoshitomi

240-241, Mar 15, 2019 Lead author

Attachment
高齢者における支出過少に特徴的な支出項目の抽出と消費能力判定方法

Yuya YOKOYAMA, Yasunari YOSHITOMI

日本オペレーションズ・リサーチ学会2018年秋季研究発表会, 176-177, Sep 7, 2018 Lead author

Attachment
支出の推定に有効な項目抽出のための0-1計画問題とGAによる近似解法

Yasunari YOSHITOMI, Taro ASADA, Yuya YOKOYAMA

日本オペレーションズ・リサーチ学会2018年秋季研究発表会, 174-175, Sep 7, 2018

Attachment
Factors Describing Impression of English Question and Answer Statements

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

6p, Mar 27, 2016 Lead author

Attachment

Books and Other Publications

演習で学ぶ MATLABによるディープラーニング

吉冨康成, 浅田太郎, 田伏正佳, 横山友也 (Role: Joint author)

コロナ社, Feb 14, 2024 (ISBN: 9784339029420)

Presentations

Failure of Software Development and Project Management Due to Pursuit of Efficiency

Yuya Yokoyama

International Seminar "The Fragile Giant: Why Businesses Must Trade Efficiency for Resilience", Jan 27, 2026 Invited

Attachment
Potential Effects and Changes of Adult Learners at Colleges or Graduate Schools through Questionnaires

Yuya Yokoyama

International Forum on AI and Social Research Innovations (ASRI 2025), Mar 3, 2025 Invited

Attachment
Statistics Method Will Break A Path To New Insights

Yuya Yokoyama

Igniting Innovation: Unleashing Creativity in the Digital Age, Feb 25, 2025 Invited

Attachment
New Insights through Statistics Method

Yuya Yokoyama

Decoding the Business and Media: Developing Critical Thinking Skills in the Age of Information Overload, Feb 24, 2025 Invited

Attachment
What Motivates Ph.D. Students for their Doctoral Research

Yuya Yokoyama

Feb 22, 2025 Invited
Statistical Method to Dataset on MICE

Yuya Yokoyama

AI, Equity, and Opportunity Bridging the Digital Divide, Feb 21, 2025 Invited

Attachment
What the Statements of Q&A Sites and EC Sites Might Impress Readers

Yuya Yokoyama

The Frontiers of Emerging Technology in the Business System in the AI Era in Universitas Putera Batam, Jan 8, 2025 Invited

Attachment
Obtaining Impressions from Statements at Q&A Sites and EC Sites

Yuya Yokoyama

Integrating Data-Driven Innovation and Information System in Universitas Surabaya, Jan 7, 2025 Invited

Attachment
What Factors Could Be Hidden for Q&A Sites and EC Sites?

Yuya Yokoyama

International Symposium on Human-AI Collaboration in STMIK Pontianak, Jan 6, 2025 Invited

Attachment
Extracting Impression of Q&A Statements and EC Sites

BINUS UNIVERSITY, Jan 3, 2025 Invited

Attachment
Investigation of Latent Effects and Changes of Adult Learners at Colleges or Graduate Schools

Yuya Yokoyama, Takaaki Hosoda, Morihiko Ikemizu, Tokuro Matsuo

17th International Congress on Advanced Applied Informatics (AAI 2024-winter), Dec 16, 2024

Attachment
Extracting Factors through Additional Impression Evaluation Experiment Assessing Both High-rated and Low-rated Reviews Posted at EC Sites

Yuya Yokoyama, Takaaki Hosoda, Tokuro Matsuo

19th International Conference on Knowledge, Information and Creativity Support Systems (KICSS 2024), Dec 6, 2024
Generalization of Methodology to Extract Impression from Q&A Statements to Other Fields or Datasets

Yuya Yokoyama

International Symposium on Applied Computer Science and Information Systems (ACSIS 2024), Sep 26, 2024 Invited

Attachment
Regarding the Semantics Combined with N-gram between Question and Answer Statements to Obtain Factor Score

Yuya Yokoyama

26th IEEE/ACIS International Conference on Computer and Information Science (ICIS 2024-Summer III), Jul 17, 2024
Extracting Impression from the Low-Rated Statements Posted at EC Sites

Yuya Yokoyama, Takaaki Hosoda, Tokuro Matsuo

16th International Congress on Advanced Applied Informatics (AAI 2024), Jul 6, 2024
4-gram Applied to English Q&A Statements to Obtain Factor Scores

Yuya Yokoyama

16th International Congress on Advanced Applied Informatics (AAI 2024), Jul 11, 2024
Using 2-gram to Detect Potential Appropriate Respondents to Questions at Q&A Sites

Yuya Yokoyama

22nd IEEE/ACIS International Conference on Software Engineering, Management and Applications (SERA 2024), May 30, 2024
Utilizing Random Data to Detect the Possibility of Dissaving Risk Against Life Expectancy for Elderly People

Yuya Yokoyama

International Symposium on Applied Information Technologies and Innovative Applications (AITIA 2024), Mar 7, 2024 Invited

Attachment
Motivation to Continue the Doctoral Research

Yuya Yokoyama

Mar 2, 2024 Invited
Will Q&A Sites Totally Be Replaced by ChatGPT?

Yuya Yokoyama

International Symposium on Digital Transformation Innovations towards in Petra Christian University Industry 5.0, Feb 29, 2024 Invited

Attachment
Is Q&A Site Out-of-date with the Emergence of ChatGPT?

Yuya Yokoyama

International Symposium on Practical AI-Based Hyperdemocracy in Universitas Internasional Batam, Feb 28, 2024 Invited

Attachment
What factors lie behind Q&A Statements?

Yuya Yokoyama

International Symposium on Future of Youth Generations on AI Era. "Towards AI Era in 2030" in Universitas Atma Jaya Makassar, Feb 3, 2024 Invited

Attachment
What impression does Q&A Statements possess?

Yuya Yokoyama

International Symposium on AI Innovations Exploring AI-Based Democracy in Universitas Atma Jaya Yogyakarta, Feb 1, 2024 Invited

Attachment
Impression of Q&A Statements

Yuya Yokoyama

International Symposium on AI Innovations Exploring AI-Based Democracy in University of Udayana, Jan 31, 2024 Invited

Attachment
Impression and Suitability of Q&A Statements through Factor Scores Using 2-Gram

Yuya Yokoyama

15th International Congress on Advanced Applied Informatics Winter (AAI 2023-Winter), Dec 11, 2023, IEEE
Using Additional Sets of Random Data to Assess Possible Dissaving Risk Against Life Expectancy for Elderly People

Yuya Yokoyama

25th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD2023), Dec 6, 2023, Springer Nature Switzerland
Application of 3-gram to English Statements Posted at Q&A Sites to Obtain Factor Scores

Yuya Yokoyama

The First International Conference on Intelligent Systems and Data Science (ISDS 2023), Nov 11, 2023, Springer Nature Singapore
Application of 5-gram to Obtain Factor Scores of Japanese Q&A Statements

Yuya Yokoyama

14th International Congress on Advanced Applied Informatics (AAI 2023), Jul 10, 2023
Developing Hypotheses and Theoretical Verification of Antecedents of Organization Engagement that Contribute to Clarification of Employee Engagement

Morihiko Ikemizu, Yuya Yokoyama, Takaaki Hosoda, Tokuro Matsuo, Teruhisa Hochin

14th International Congress on Advanced Applied Informatics (AAI 2023), Jul 9, 2023
Consideration of Semantics between Q&A Statements to Obtain Factor Score

Yuya Yokoyama

Proceedings of The 21st IEEE/ACIS International Conference on Software Engineering Research, Management and Applications (SERA 2023), May 24, 2023
Application of word2vec to the Feature Values of Statements Posted at Q&A Site to Estimate Factor Scores

Yuya Yokoyama

International Forum on Smart Systems and Service Management (SSSM 2023), Mar 16, 2023 Invited

Attachment
Using 4-gram to Obtain Factor Scores of Japanese Statements Posted at Q&A Sites

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya

Proceedings of the 13th International Congress on Advanced Applied Informatics (AAI 2022-Winter), Dec 12, 2022
Experimental Evaluation of Introducing Appropriate Respondents to Questioners at Q&A Sites

Yuya Yokoyama

2nd International Symposium on Applied Informatics and Innovations (ISAII 2022), Sep 24, 2022 Invited

Attachment
Application of 2-gram to English Q&A Statements to Obtain Factor Scores

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya

23rd ACIS International Summer Virtual Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD2022-Summer), Jul 6, 2022, IEEE
Estimation of Factor Scores from Feature Values of Statements to Obtain Potential Appropriate Respondents to Questioners at Japanese and English Q&A Sites

Yuya Yokoyama

International Symposium on Applied Informatics Innovations (ISAII 2022), Mar 23, 2022 Invited

Attachment
Construction of Social Network Observing Secure and Independent Economic Activities of Elderly People

Yuya Yokoyama

International Forum on Applied Information Technology and Social Informatics (IFAITSI 2022), Jan 12, 2022 Invited

Attachment
Application of 2-gram to Obtain Factor Scores of Statements Posted at Q&A Sites

Yuya Yokoyama, Teruhisa Hochin and Hiroki Nomiya

8th ACIS International Virtual Conference on Applied Computing & Information Technology (ACIT 2021), Jun 22, 2021
Further Observation to Investigate Tendency of Obtaining Potential Appropriate Respondents to Questions at Q&A Sites with Expansion of Categories

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya

21st ACIS International Semi-Virtual Winter Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD2021-Winter), Jan 29, 2021
Further Assessment of Dissaving Risk against Life Expectancy for Elderly People through Anonymous Data and Random Data for Social Implementation

Yuya Yokoyama, Yasunari Yoshitomi

9th International Congress on Advanced Applied Informatics (AAI 2020), Sep 1, 2020
Assessment of Dissaving Risk against Life Expectancy for Elderly People through Anonymous Data and Random Data

Yuya YOKOYAMA, Yasunari YOSHITOMI

20th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2019), Jul 9, 2019
A Method to Assess Dissaving Risk against Life Expectancy for Elderly People

Yuya YOKOYAMA, Yasunari YOSHITOMI

20th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2019), Jul 9, 2019
Obtaining Factors of Q&A Statements with the Consideration of Categories

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

6th International Conference on Computational Science/ Intelligence & Applied Informatics (CSII 2019), May 29, 2019
A Method to Determine DIssaving Risk of Elderly People

Yuya YOKOYAMA, Yasunari YOSHITOMI

The 2019 Spring National Conference of Operations Research Society of Japan, Mar 15, 2019
Estimation Improvement of Objective Scores of Answer Statements with Consideration of Multicollinearity and Semantic Similarity

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

5th International Conference on Computational Science/ Intelligence & Applied Informatics (CSII 2018), Jul 10, 2018, IEEE
Estimation Improvement of Objective Scores of Answer Statements with Consideration of Semantic Similarity

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

19th IEEE/ACIS International Conference on Software Engineering, Artificial Intelligence Networking and Parallel/Distributed Computing (SNPD 2018), Jun 27, 2018, IEEE Computer Society
Potential Tendency Differences between English and Japanese in Detecting Appropriate Respondents at Q&A Sites

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya

The 4th International Symposium on Active Science and Engineering, and the 29th Modern Artificial Intelligence and Cognitive Science Conference (ISASE-MAICS 2018), Jun 1, 2018
Estimation of Factor Scores from Feature Values of English Question and Answer Statements

Yuya Yokoyama, Teruhisa Hochin, Hiroki Nomiya

15th IEEE/ACIS International Conference on Computer and Information Science (ICIS 2016), Jun 27, 2016, IEEE COMPUTER SOC

In order to eliminate mismatches between the intentions of questioners and respondents of Question and Answer (Q&A) sites, nine factors of impressions for Japanese statements have experimentally been obtained. Nine factors have also been obtained from the impression of English Q&A statements. This paper estimates factor scores of English Q&A statements through multiple regression analysis. These are words and characters, syntactic information, and appearance percentages. It is shown that estimation accuracies of all of the nine factors are very good.
Factors Describing Impression of English Question and Answer Statements

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

第11回日本感性工学会春季大会, Mar 27, 2016
Towards Detecting Appropriate Respondents to Questions Posted at Q&A Sites by Disregarding and Considering Categories of Answer Statements

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

The 2nd International Symposium on Affective Science and Engineering (ISASE 2016), Mar 22, 2016
On the Validation of Objective Scores of Answer Statements for Good Answers

Yuya YOKOYAMA, Teruhisa HOCHIN, Hiroki NOMIYA

The 8th Forum on Data Engineering and Information Management (DEIM2016), Mar 1, 2016

Teaching Experience

Oct, 2024 - Mar, 2026

Advanced Exercises: Business Systems Design Engineering 2 (Advanced Institute of Industrial Technology)
Apr, 2024 - Sep, 2025

Advanced Exercises: Business Systems Design Engineering 1 (Advanced Institute of Industrial Technology)
Apr, 2024 - Sep, 2025

Introduction to the “business innovator” (Advanced Institute of Industrial Technology)
Apr, 2023 - Sep, 2023

Data Structures and Algorithms (Kyoto Prefectural University)
Apr, 2017 - Sep, 2023

Laboratory Work in Basic Physics (Kyoto Institute of Technology)

Professional Memberships

Jul, 2020 - Present

International Institute of Applied Informatics
Apr, 2012 - Present

INFORMATION PROCESSING SOCIETY OF JAPAN
Dec, 2011 - Present

International Association for Computer and Information Science
Sep, 2011 - Present

JAPAN SOCIETY OF KANSEI ENGINEERING

Research Projects

Research of Extracting and Selecting Highly Reliable Answer Statements for Questions Posted at Q&A Sites

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2024

Yuya Yokoyama
Research on Introducing Questioners to Respondents at Question and Answer Site

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2016

Yuya Yokoyama

Industrial Property Rights

特開2019-105952 消費能力判定装置、消費能力判定プログラムおよび記録媒体

吉冨康成, 檀友也
特願2018-81859 財産管理能力判定装置、財産管理能力判定プログラムおよび記録媒体

吉冨康成, 檀友也

Social Activities

Tokyo Digital Academy, Seminar for City Officials "Data Analysis Practical Course for Civil Servants"

Lecturer

General Incorporated Foundation GovTech Tokyo, Nov 19, 2025 - Nov 19, 2025
Research Instruction on Fiifteen Ph.D Students in BINUS University (Colloquium)

Consultant

BINUS University, Mar 1, 2024 - Mar 1, 2024
Recurrent Education Program "Data Science Seminar for Employees

Lecturer

Public Interest Incorporated Foundation The Consortium of Universities in Kyoto, "Data Science Seminar for Employees, Jun 25, 2022 - Jul 16, 2022

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