Tsutomu Yoshioka

Department of International Tourism ManagementProfessor
Course of International Tourism StudiesProfessor
Last Updated :2026/05/06

■Researcher basic information

Degree

  • Ph.D in Business Administration, Asia University, Sep. 2012
  • MBA (Master of Business Administration), SANNO Univerity, Mar. 2009

Research Interests

  • Sauna business management
  • Sauna business
  • Sauna Tourism
  • Tourism
  • Sauna
  • labor productivity
  • Productivity
  • Hospitality Management Accounting
  • Hospitality Management
  • Hospitality management
  • Strategic Management Accounting
  • Cost Accounting
  • Management Accounting

Research Areas

  • Humanities & social sciences, Tourism studies, Sauna Tourism
  • Humanities & social sciences, Tourism studies, Hospitality Management
  • Humanities & social sciences, Accounting, Hospitality Management Accounting
  • Humanities & social sciences, Business administration, Hospitality Management

■Career

Research History

  • Apr. 2026 - Present
    Asia University, Faculty of Business Administration Department of Hospitality Management, Professor
  • Apr. 2026 - Present
    Toyo University, Graduate School of International Tourism Management, Visiting professor
  • Apr. 2023 - Present
    Bunkyo University, Faculty of Information & Comunications, Adjunct Lecturer
  • Apr. 2021 - Mar. 2026
    Toyo University, Faculty of International Tourism Management, Professor
  • Apr. 2016 - Mar. 2026
    Asia University, Faculty of Business Administration Department of Hospitality Management, Adjunct lecturer
  • Sep. 2020 - Mar. 2022
    Rikkyo University, College of Tourism, Adjunct lecturer
  • Apr. 2017 - Mar. 2021
    Toyo University, Faculty of International Tourism Management, Associate professor
  • Apr. 2017 - Sep. 2018
    Sanno University, School of Information Oriented Management, Adjunct lecturer
  • Apr. 2013 - Mar. 2017
    Toyo University, Faculty of Regional Development Studies Department of Tourism, Adjunct lecturer
  • Apr. 2012 - Mar. 2017
    Sanno University, School of Information Oriented Management, Associate professor
  • Apr. 1986 - Jan. 2012
    Software development companies

Education

  • Apr. 2009 - Sep. 2012, ASIA University, Graduate School of Asian and International Business Strategy, (Ph.D course)
  • Apr. 2007 - Mar. 2009, SANNO University, Graduate School of Comprehensive Management, (MBA Course)
  • Oct. 2002 - Sep. 2006, SANNO University, School of Management and Information Science, (Distance Learning Course)

Committee Memberships

  • Aug. 2024 - Present
    Manager, Japan Academy of Management
  • Oct. 2023 - Present
    Auditor, The Association for Leisure and Tourism Studies
  • Apr. 2022 - Mar. 2025
    Editor of Management Accounting Review, Japan Cost Accounting Association
  • Nov. 2020 - Oct. 2023
    Chief Director, The Association for Leisure and Tourism Study
  • Oct. 2018 - Nov. 2020
    Auditor, The Association for Leisure and Tourism Study
  • Apr. 2015 - Nov. 2018
    部会長, 余暇ツーリズム学会:ツーリズム心理研究部会
  • Sep. 2016 - Oct. 2018
    Chief Director, The Association for Leisure and Tourism Study
  • Apr. 2014 - Mar. 2017
    Manager, Japan Association of Management Accounting
  • Sep. 2016 - Sep. 2016
    委員長, 余暇ツーリズム学会2016年度全国大会準備委員会
  • Sep. 2014 - Sep. 2016
    Director, The Association for Leisure and Tourism Study
  • Oct. 2015 - Oct. 2015
    準備委員会 委員, 日本社会関連会計学会 第28回 全国大会
  • May 2015 - May 2015
    委員長, 第32回 日本経営分析学会 年次大会 準備委員会

■Research activity information

Awards

  • Nov. 2021
    Japan Society of Organization and Accounting, Encouraging prize
    The Impact and Effect of Management Control Systems on the Productivity of the Lodging Industry in Japan
    Tsutomu YOSHIOKA
  • Oct. 2021
    The Association for Leisure and Tourism Study, Book Award of Academic Awards
    Hospitality Strategic Accounting: Building the Hospitality Revenue Cycle, Japan, Japan society
    Tsutomu YOSHIOKA

Papers

Misc.

  • ホテル会計入門講座:ホテル会計『超』入門(連載記事;2025年5月号~継続中)               
    吉岡 勉
    月刊ホテルレストラン, May 2025
  • K社における財務情報活用による問題発見・課題形成プロセスの構築と改善提案 ~ 新・課題づくりモデルの開発と経営システム改善 ~               
    吉岡 勉
    コンサルティング・ワークショップ・レポート(修士論文相当), 2009

Books and Other publications

  • Management Control Systems for Strategic Changes - Applying to Dematurity and Transformation of Organizations (Japanese Management and International Studies: Volume 17)
    Tsutomu YOSHIOKA, Joint work, Chap. 7; The Impact and Effect of Management Control Systems on the Productivity of the Lodging Industry in Japan
    worldscientific, Jan. 2021, Reviewed
  • Hospitality Strategic Accounting: Building the Hospitality Revenue Cycle               
    Tsutomu YOSHIOKA, Single work
    NextPublishing Authors Press, Sep. 2020
    9784802099615
  • 「おもてなし」を考える -余暇学と観光学による多面的検討-               
    吉岡 勉, Joint work, おもてなしの会計論
    創文企画, Mar. 2019, Not reviewed
    9784864131186
  • 数字でとらえるホスピタリティ 会計&ファイナンス               
    吉岡 勉, Joint work
    産業能率大学出版部, Apr. 2014, Not reviewed
    4382057078
  • 業界団体向け通信教育テキスト「ファイナンス」               
    Joint work
    2009, Not reviewed
  • 業界団体向け通信教育テキスト「アカウンティング」               
    Joint work
    2009, Not reviewed

Presentations

  • デジタル技術を活用した無人サウナ運営の事例研究               
    吉岡勉
    経営行動研究学会 第132回研究部会, 25 Apr. 2026
  • Application of Digital Technology to Sauna Facilities               
    Tsutomu YOSHIOKA
    The Association for Leisure and Tourism Studies, 28 Feb. 2026
  • APPLICATION OF DIGITAL TECHNOLOGY IN SAUNA FACILITIES: A CASE STUDY OF UNMANNED SAUNA OPERATION               
    Tsutomu YOSHIOKA
    Global Hospitality and Tourism Research Summit - Fukuoka, 17 May 2025
  • What factors determine the destination sauna facility of sauna trips: A survey of Japanese sauna enthusiasts
    Tsutomu YOSHIOKA
    ICHTMM-24; International Conference on Hospitality, Tourism Marketing and Management, 17 Dec. 2024
  • A Study of Factors Determining Sauna Travel Destinations
    Tsutomu YOSHIOKA
    ICTTI-24: International Conference on Tourism and Tourism Industry, 18 Nov. 2024
  • The Entertainment in Saunas: Show Aufguss
    Tsutomu YOSHIOKA
    Joint Congress of The Association for Leisure and Tourism Studies, 09 Nov. 2024
  • "Sustainable Profit Management for improving productivity"
    Tsutomu YOSHIOKA; Hirohisa HIRAI; Ko TASAKA; Kimitoshi SATO; LI Huishuang; Shu UMEDA; Natsuki SATO
    Annual Conference of Japan Association of Management Accounting, 2024, 03 Sep. 2024, [Invited]
  • A Study on Determinants of Destination for Sauna Use: Based on a Questionnaire Survey
    Tsutomu YOSHIOKA
    2024 Annual Conference of Japan Kanto Chapter of The Association for Leisure Tourism Studies, 09 Aug. 2024, Japan Kanto Chapter of The Association for Leisure Tourism Studies
  • A Study of Destination Determinants of Sauna Tourism in Japan: from a Questionnaire Survey               
    Tsutomu YOSHIOKA
    APacCHRIE, The Asia-Pacific Council on Hotel, Restaurant, and Institutional Education, 2024, 26 May 2024
  • A Case Study of Revenue Earnings Models in the Sauna Business: The Cases of Subscription and Dynamic Pricing               
    Tsutomu YOSHIOKA
    127th Research Seminar, Japan Academy of Management, 27 Apr. 2024
  • A Study on the Sauna Tourism: From UX Research on Sauna Business
    Tsutomu YOSHIOKA
    4th International Conference on Tourism Management and Hospitality, 01 Mar. 2024
  • A Study on the Potential of Sauna Tourism: From UX Research on Sauna Business Management
    Tsutomu YOSHIOKA
    The 3rd GLOSITH; Global Congress of Special Interest Tourism & Hospitality, 11 Nov. 2023
  • Well-being through Saunas (Conference Theme: Leisure and Tourism for Well-being)
    Tsutomu YOSHIOKA
    Annual Conference of The Association for Leisure and Tourism Studies, 2023, 28 Oct. 2023, [Invited]
  • Addressing the Labor Shortage Problem in the Japanese Hotel Industry: Management Control Systems as a package               
    Ayako YAMAGUCHI; Tsutomu YOSHIOKA
    32nd Asian-Pacific Conference on International Accounting Issues, 17 Oct. 2023
  • A Study on Sustainable Profit Management for Productivity Improvement
    Tsutomu YOSHIOKA; Ko TASAKA; Akimichi AOKI
    49th Annual Conference of Japan Cost Accounting Association, 06 Sep. 2023
  • Application of AI Technology to Improve Time-Based Productivity: A Case Study of a Hotel Specializing in Lodging
    Tsutomu YOSHIOKA
    Annual Conference of The Japan Society of Organization and Accounting, 2023, 16 Jul. 2023
  • A Study on the Factors of Sauna as a Potential Destination in Sauna Tourism: The Case of Japan
    Tsutomu YOSHIOKA; Mayumi YASUMI
    APacCHRIE, The Asia-Pacific Council on Hotel, Restaurant, and Institutional Education, 2023. Clark, Philippines., 26 May 2023
  • A Study on the Relationship between Labor Productivity Improvement Measures and "Congestion Cost" in Hotel Rooms Department               
    Tsutomu YOSHIOKA
    The 123rd Research Meeting of the Japan Academy of Management, 15 Apr. 2023
  • Application of AI Technology to Improve Labor Productivity in Hotels Specializing in Lodging
    Tsutomu YOSHIOKA; Ryuji SHIOYA; Ko TASAKA
    Joint Symposium of Center for Computational Mechanics Research (CCMR) & Faculty of Information Sciences and Arts, Toyo University "DEI Society and Simulation Science", 21 Feb. 2023
  • Components of Sauna as a Destination - A Study of Sauna Tourism Policies for Domestic and Inbound Tourists
    Tsutomu YOSHIOKA
    Kyushu Branch Conference of the Association for Leisure and Tourism Studies, 2022, 28 Jan. 2023
  • A Study of Two Approaches to Improving Productivity in the Lodging Industry - A Management Accounting Study focusing on Labor Productivity and Capital Productivity
    Tsutomu YOSHIOKA; Ko TASAKA; Akimichi AOKI
    Annual Conference of The Japan Association of Management Accounting, 2022, 30 Aug. 2022
  • Improving efficiency of customer service operations at hotels using AI technology
    Tsutomu YOSHIOKA; Ryuji Shioya
    Joint Symposium of Center for Computational Mechanics Research (CCMR) & Faculty of Information Sciences and Arts, Toyo University Safety, Security and Healing ~ Role of Simulation Science ~, 22 Mar. 2022
  • A Study on the Classification of Total Costs into Fixed and Variable Costs in CVP Analysis - A Case Study of a Japanese Hotel Company
    Tsutomu YOSHIOKA
    Kyushu Branch Conference of the Association for Leisure and Tourism Studies, 2021, 29 Jan. 2022
  • A consideration on the contribution of target costing on labor productivity increase in the lodging industry
    Tsutomu YOSHIOKA; Ko TASAKA; Akimichi AOKI
    2021 Annual Meeting of The Japanese Association of Management Accounting, 27 Aug. 2021
  • A Study of Labor Productivity Problems on the Hospitality Industry in Japan
    Tsutomu YOSHIOKA
    1st Joint Conference on Integrated Resort Research, 22 Jul. 2021
  • How to solve the problem of Labor Productivity of the Lodging industry in Japan - by the perspective of Revenue Management
    Tsutomu YOSHIOKA
    7th International Conference on Hospitality and Tourism Management 2020 (ICOHT 2020), 25 Aug. 2020
  • Survey on Information to be disclosed by Accommodations - A study on Questionnaire research               
    Tsutomu YOSHIOKA
    5th International Tourism and Hospitality Management Congress, Sarajevo, Bosnia and Herzegovina, 04 Oct. 2019
  • A Study on Improvement of Labor Productivity in Hotel Industry by Revenue Management               
    Tsutomu YOSHIOKA
    Annual conference of Japan Association of Management Accounting, 2019, 29 Aug. 2019
  • How hotels can compete with a new competitor - a study on comparing to vacation rentals               
    Tsutomu YOSHIOKA
    2nd Global Congress of Special Interest Tourism and Hospitality, Taipei, Taiwan, 20 Apr. 2019
  • A Study on the Productivity Problem of Lodging Service Industry in Japan - referring a case of a business hotel.               
    Tsutomu YOSHIOKA
    4th International Tourism and Hospitality Management Congress, 18 Oct. 2018
  • Customer Management on Platform Service (Final Report of Study group "Customer Management on Service industry")               
    Tsutomu YOSHIOKA
    Annual Conference 2018, Japan Association of Management Accounting, 29 Aug. 2018
  • Problems of Productivity on Lodging, Food and Beverage Service               
    Tsutomu YOSHIOKA
    Annual Conference 2017, The Association of Leisure and Tourism Studies, 28 Oct. 2017
  • Problems of Productivity on Tourism Services               
    Tsutomu YOSHIOKA
    1st Study Meeting 2017, Japan Society of Organization and Accounting, 21 Oct. 2017
  • いま知っておくべき、宿泊産業統一会計基準~ユニフォーム・システム改版のポイント               
    吉岡 勉
    アカデミック講座(株式会社宿屋塾), 27 Sep. 2017, [Invited]
  • Re-examination of Service on the Perspective of Management Accounting               
    Tsutomu YOSHIOKA
    日本管理会計学会 2017年度 全国大会, 28 Aug. 2017, Japan Association of Management Accounting
  • マザーリングマネジメントについての試論               
    吉岡 勉
    余暇ツーリズム学会 関東支部&ツーリズム心理研究部会 合同研究会, 21 Nov. 2015
  • A Theoretical study about Management Control on “Mothering Management”               
    Tsutomu YOSHIOKA
    日本管理会計学会 2015年度 全国大会, 30 Aug. 2015
  • Unified topic report: Management Analysis on "Casino Accounting"               
    Tsutomu YOSHIOKA
    32nd Annual Congress, Business Analysis Association, 16 May 2015, 日本経営分析学会, [Invited]
  • レストラン業のイールド・マネジメント指標に関する一考察               
    吉岡 勉
    日本経営分析学会ホスピタリティ産業フォーラム, 28 Feb. 2015, 日本経営分析学会ホスピタリティ産業フォーラム
  • 訪日イスラム教徒へのおもてなしに関する一考察               
    山﨑 祐希; 吉岡勉
    アジア・国際経営戦略学会観光経営研究部会研究会, 21 Feb. 2015, アジア・国際経営戦略学会観光経営研究部会
  • 日本のMICE政策に関する一考察 - 観光庁へのインタビュー調査より               
    天野里美; 吉岡勉
    余暇ツーリズム学会関東支部研究会, 22 Nov. 2014, 余暇ツーリズム学会関東支部
  • レストランビジネスにおけるイールド・マネジメントに関する一考察               
    吉岡 勉
    余暇ツーリズム学会関東支部研究会, 22 Nov. 2014, 余暇ツーリズム学会関東支部
  • 料飲産業のホスピタリティ戦略管理会計 に関する一考察 -宿泊産業におけるレベニュー・マネジメント との比較に焦点をあてて-               
    吉岡 勉
    余暇ツーリズム学会, 08 Sep. 2014
  • ブライダル産業における収益管理に関する一考察               
    吉岡 勉
    日本管理会計学会 2013年度全国⼤会, 15 Sep. 2013
  • 戦略管理会計のホスピタリティ・マネジメントへの貢献               
    吉岡 勉
    日本経営分析学会第30回年次全国大会, 14 Jul. 2013
  • ホスピタリティ・マネジメントに対する戦略管理会計の貢献に関する一考察               
    吉岡 勉
    日本経営分析学会ホスピタリティ産業フォーラム, 02 Mar. 2013
  • 論文の書き方・スクーリング満喫方法               
    吉岡 勉
    産業能率大学 通信教育課程 東京学生会, 24 Jan. 2013, [Invited]
  • 宿泊産業統一会計基準(USALI)の役割に関する一考察               
    吉岡 勉
    メルコ学術振興財団 管理会計フォーラム, 16 Jun. 2012
  • ホテル産業の戦略管理会計に関する研究               
    吉岡 勉
    2011年度第1回「リサーチ・セミナー」(日本管理会計学会・日本原価計算研究学会共催), 23 Jul. 2011
  • 「宿泊産業統一会計基準(ユニフォーム・システム)」がもたらすベネフィットに関する考察               
    吉岡 勉
    日本国際観光学会 2011年4月例会(第137回), 23 Apr. 2011
  • OBから聞いてみよう! 勉強の楽しさと役立ちかた - 会計の”超”初級編を学びながら               
    吉岡 勉
    産業能率大学 通信教育課程 東京学生会, 23 Jan. 2011, [Invited]
  • MICE誘致における会計情報の役割               
    吉岡 勉
    日本社会関連会計学会 第23回全国大会, 21 Nov. 2010
  • Verification and Implication of Performance Indicators in Hotel Industry in Japan               
    Tsutomu YOSHIOKA
    "Annual Conference Meeting" IAGBT & AIBS & KITRI, 07 Aug. 2010
  • 国際財務報告基準(IFRS)に対応した会計戦略論の新たな指標値とその有用性               
    アジア・国際経営戦略学会 第3回報告大会, 2010
  • Verification and Implication of Performance Indicators in Hotel Industry in Japan               
    Annual Conference Meeting August 6th & 7th, 2010 Asia University, Tokyo-Japan, IAGBT & AIBS, 2010
  • 新卒採用システムにおけるマーケティング理論の適用               
    吉岡勉
    人材育成学会 第6回年次大会, 06 Dec. 2008

Teaching Experience

  • Advanced Theory of Hospitality Accounting and Finance               
    Apr. 2025 - Present
    Toyo University
  • Integrated Resort Management/Integrated Resort System and Tax II               
    Sep. 2024 - Present
    Toyo University
  • Studies on Meeting, Incentive Tour, Convention, Exhibition/Integrated Resort System and Tax I               
    Apr. 2024 - Present
    Toyo University
  • Accounting Information System               
    Apr. 2023 - Present
    Bunkyo University
  • Theory of Hospitality Management Accounting               
    Apr. 2022 - Present
    Toyo University
  • Theory of Financial Statements               
    Apr. 2022 - Present
    Toyo University
  • Introduction to Tourism Company Accounting               
    Apr. 2022 - Present
    Toyo University
  • Theory of Global Hotel Accounting               
    Apr. 2021 - Present
    Toyo University
  • Cost Management               
    Apr. 2019 - Present
    Toyo University
  • Theory of Hospitality Management Accounting               
    Apr. 2016 - Present
    Asia University
  • Theory of Tourism Finance / Tourism Finance               
    Apr. 2014 - Present
    Toyo University
  • Advanced Theory of Hospitality Management Accounting               
    Apr. 2022 - Mar. 2025
    Toyo University
  • Management in Tourism               
    Sep. 2020 - Mar. 2022
    Rikkyo University
  • Advanced Theory of Revenue Management of Tourism Industry               
    Apr. 2018 - Mar. 2022
    Toyo University
  • Theory of Business Analysis               
    Apr. 2015 - Mar. 2022
    Toyo University
  • Hospitality Quantitative Analysis               
    Apr. 2015 - Mar. 2022
    Toyo University
  • Theory of Service Innovation               
    Apr. 2018 - Mar. 2020
    Toyo University
  • Theory of Financial Accounting               
    Apr. 2017 - Mar. 2019
    Asia University
  • Theory of Management Accounting               
    Apr. 2017 - Mar. 2019
    Asia University
  • Apr. 2017 - Mar. 2018
    東洋大学 国際観光学部
  • Apr. 2017 - Mar. 2018
    東洋大学 国際観光学部
  • Apr. 2017 - Mar. 2018
    東洋大学 国際観光学部
  • Management Accounting _               
    Apr. 2015 - Mar. 2017
    Sanno University
  • Cross Cultural Study               
    Apr. 2015 - Mar. 2017
    Sanno University
  • Apr. 2012 - Mar. 2017
    産業能率大学 情報マネジメント学部

Professional Memberships

Research Projects

Other

  • Sauna Spa Health Trainer
    Jul. 2023 - Present
  • Sauna Spa Professional Manager
    Jan. 2023 - Present
  • Sauna Spa Wellness Adviser
    Oct. 2022 - Present