Updated on 2024/05/23

写真a

 
IWAMOTO, Hiroki
 
Affiliation
Faculty of Science and Engineering, School of Creative Science and Engineering
Job title
Assistant Professor(non-tenure-track)
Degree
Ph.D. in engineering ( 2021.10 Keio University )
修士

Research Experience

  • 2023.04
    -
    Now

    Waseda University   Division of Socio-Cultural Studies, School of Creative Science and Engineering.   Assistant Professor (without tenure)

  • 2022.04
    -
    2023.03

    Waseda University   Department of Industrial & Management Systems Engineering, School of Creative Science and Engineering.   Assistant Professor

  • 2020.04
    -
    2022.03

    Waseda University   Department of Industrial & Management Systems Engineering, School of Creative Science and Engineering.   Research Associate

  • 2022.04
    -
    Now

    Tokyo Keizai University

  • 2019.04
    -
    2020.03

    Japan Society for the Promotion of Science   Research Fellowship for Young Scientists (DC2)

  • 2017.10
    -
    2019.03

    Keio University   Faculty of Science and Technology Department of Industrial and Systems Engineering   Assistant Professor

  • 2016.04
    -
    2017.02

    Mizuho Bank, Ltd.

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Education Background

  • 2017.04
    -
    2020.03

    Keio University   Graduate School of Science and Technology   School of Science for Open and Environmental Systems, Doctoral Program  

  • 2014.04
    -
    2016.03

    Keio University   Graduate School of Science and Technology   School of Science for Open and Environmental Systems  

  • 2010.04
    -
    2014.03

    Keio University   Faculty of Science and Technology   Department of Industrial and Systems Engineering  

Committee Memberships

  • 2021.06
    -
    2023.06

    公益社団法人 日本経営工学会  会員委員会 委員

Professional Memberships

  • 2022.10
    -
    Now

    日本経営システム学会

  • 2021.01
    -
    Now

    経営情報学会

  • 2018.05
    -
    Now

    日本品質管理学会

  • 2018.05
    -
    Now

    日本経営工学会

  • 2017.11
    -
    Now

    日本管理会計学会

  • 2017.10
    -
    Now

    日本オペレーションズ・リサーチ学会

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Research Areas

  • Social systems engineering / Statistical science / Accounting / Business administration

Research Interests

  • 経営分析, 統計的品質管理, 人的資源管理, 実証分析, データ解析

Awards

  • 21th Asian Network for Quality Congress Best Paper Award

    2023.10   Asian Network for Quality  

    Winner: Riku Ohta, Masato Ohkubo, Hiroki Iwamoto, Yasushi Nagata

  • 20th Asian Network for Quality Congress Best Paper Award

    2022.10   Asian Network for Quality   Ensemble Pruning of MT Method

    Winner: Katsuhiko Tateishi, Hiroki Iwamoto, Yasushi Nagata

  • 2015年度 学生優秀発表賞

    2015.11   一般社団法人 日本経営情報学会  

    Winner: 岩本大輝

Media Coverage

  • ALIGNING PEOPLE, CSR, AND FINANCE: FROM JAPAN TO THE WORLD

    Newspaper, magazine

    Author: Other  

    The Council on Business & Society   Global Voice magazine Vol.16  

    pp.76-81  

    2020.12

 

Papers

  • MT Method for Anomaly Detection and Classification using EM-λ Algorithm

    Katsuhiko Tateishi, Hiroki Iwamoto, Shinto Eguchi, Yasushi Nagata

    Quality Innovation Prosperity   28 ( 1 ) 1 - 14  2024.03  [Refereed]  [International journal]

     View Summary

    Purpose: In this paper, we propose a method to classify and detect normal, known anomalies, and unknown anomalies by combining the expectation–maximisation (EM-λ) algorithm and the Mahalanobis–Taguchi (MT) method.Methodology/Approach: The proposed method learns normal data that are expected to be homogeneous and known abnormal data and performs classification and detection by parameter estimation using the EM-λ algorithm. Conventional methods perform analysis based on parameter estimation using the EM algorithm. However, the EM algorithm can degrade classification accuracy if it does not assume that the data fits the model's generative process.Findings: We verify the performance of the proposed method using artificially generated data and real-world bean data for classification as data that do not satisfy this assumption. The validation results show up to 6% improvement over the conventional method in classification accuracy and unknown anomaly discrimination accuracy.Research Limitation/implication: We try various patterns for the parameter of the proposed method in the verification. However, this way is computationally expensive.Originality/Value of paper: Conventional methods perform analysis based on parameter estimation using the EM algorithm. Our proposal method seeks to improve accuracy by using the EM-λ algorithm for parameter estimation, which is expected to improve classification accuracy when the data do not conform to the generative assumptions of the EM algorithm's model.

    DOI

    Scopus

  • マルチレベル分析を用いたCSV活動のTweet拡散要因の分析

    高田真也, 岩本大輝, 大野髙裕

    経営システム学会誌   40 ( 2 )  2023.12  [Refereed]  [Domestic journal]

  • Ensemble Pruning of MT Method

    Katsuhiko Tateishi, Hiroki Iwamoto, Yasushi Nagata

    Total Quality Science   9 ( 1 ) 8 - 17  2023.10  [Refereed]  [Invited]

    DOI

  • Adaptation of the Mahalanobis–Taguchi Method to Ordinal Scale

    Hiroki IWAMOTO, Yasushi NAGATA

    Total Quality Science   8 ( 1 ) 14 - 22  2022.12  [Refereed]  [International journal]

    Authorship:Lead author

    DOI

  • The Relationship between Work-Life Balance Assisting Measures and Women’s Career Advancement

    岩本大輝, 鈴木秀男

    経営情報学会誌   30 ( 4 )  2022.03  [Refereed]

    Authorship:Lead author

    J-GLOBAL

  • Evaluation of personnel-adjusted added value: Estimating its relationship with future profit in Japan

    Iwamoto, H., Suzuki, H.

    Cogent Economics and Finance   9 ( 1 )  2021.07  [Refereed]

    Authorship:Lead author

     View Summary

    Personnel-adjusted added value (PAV) is an index to measure human resource management for internal purposes. In this study, the possibilities and limitations of PAV using external estimates are investigated. To measure the effectiveness of PAV, it is compared with the general added value. This proves the effect of the personnel adjustment. The relationship between future performance and PAV (and added value), including other control variables, are statistically analysed by hierarchical linear modelling. The essence of PAV is to separate the basic labour costs from the company-specific personnel costs. To calculate PAV from outside an enterprise, the basic labour costs should be estimated. For this purpose, in addition to financial data, this study uses survey data on recruitment and employment in Japan. Statistical analysis is applied to the 2008-2016 longitudinal company data of 569 Japanese companies. We find that PAV, a management indicator that includes the adequacy of human resource management, is a useful factor related to future performance.

    DOI

    Scopus

  • 複数ドメインからの転移を想定した回帰手法とタクシーの需要予測-Multi Source Two-stage TrAdaBoost.R2の提案-

    柴田頼仁, 岩本大輝, 小森晴菜, 多賀友哉, 鈴木秀男

    オペレーションズ・リサーチ   66 ( 2 )  2021  [Refereed]

    J-GLOBAL

  • 15
    Citation
    (Scopus)
  • Human Capital Management Using PAV (Personnel Adjusted Added Value)

    岩本大輝, 高橋正子

    経営情報学会誌   24 ( 4 )  2016

    Authorship:Lead author

    J-GLOBAL

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Books and Other Publications

  • 経営効率性の測定の基礎 DEA分析の事例で学ぶ生産性・効率性向上への挑戦

    刀根 薫, 筒井 美樹, 丸山 幸宏, 濱口 由子, 福山 博文, 橋本 敦夫, 岩本 大輝, 大里 怜史

    日本評論社  2022.11 ISBN: 4535559317

    ASIN

Presentations

  • An anomaly detection method using missing value imputation for the ordinal scale

    Hiroki Iwamoto, Yasushi Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • A Study on the Improvement Targets of Data Envelopment Analysis Models

    Xu Wang, Hiroki Iwamoto, Takashi Hasuike

    IEEE International Conference on Industrial Engineering and Engineering Management 2023 

    Presentation date: 2023.12

  • MT method for anomaly detection and classification in semi-supervised learning

    Katsuhiko Tateishi, Hiroki Iwamoto, Shinto Eguchi, Yasushi Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • Analysis of the Impact of the Hometown Tax Donation Program on Local Government Finance

    Yuki Inoue, Hiroki Iwamoto, Yasushi, Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • Taguchi’s RT method with sparse principal component analysis

    Riku Ohta, Masato Ohkubo, Hiroki, Iwamoto, Yasushi Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • Analysis of the Impact of Novel Coronavirus Infections on Population Flow in Large Cities

    Shogo Nakamura, Hiroki Iwamoto, Yasushi Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • Analysis of the relationship between student academic achievement and the use of ICT equipment

    Yusuke Sugisaki, Hiroki Iwamoto, Yasushi Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • A new method to deal with missing data using Taguchi's T-method

    Riku Fujii, Hiroki Iwamoto, Yasushi, Nagata

    21th ANQ congress 2023  (Ho chi minh) 

    Presentation date: 2023.10

  • Robust Parameter Design Method for Multilevel Control Factors with Error Factors

    Yukiya Tomizawa, Hiroki Iwamoto, Yasushi Nagata

    (Ho chi minh) 

    Presentation date: 2023.10

  • CSV活動と人的資産の関係分析-従業員教育に着目して-

    高田 真也, 岩本 大輝, 大野 髙裕, 枝川 義邦

    第70回 日本経営システム学会 全国研究発表大会 

    Presentation date: 2023.05

  • Relationship between Value Added Intellectual Coefficient (VAIC) Focusing on Human Capital and Future Profit : An empirical study from Japan

    Hiroki Iwamoto

    The Asia Pacific Industrial Engineering & Management Systems Conference 2022 

    Presentation date: 2022.11

  • Impact of the Use of "YouTube Shorts" on YouTube

    Yukiya Tomizaw, Hiroki Iwamoto, Yasushi Nagata

    20th ANQ congress 2022 

    Presentation date: 2022.10

  • Ensemble Pruning of MT Method

    Katsuhiko Tateishi, Hiroki Iwamoto, Yasushi Nagata

    Presentation date: 2022.10

  • Evaluation on financial conditions of commercial banks in Japan-China

    Qifeng Chen, Hiroki Iwamoto, Shinto Eguchi, Yasushi Nagata

    20th ANQ congress 2022 

    Presentation date: 2022.10

  • Investigation Related to Changes in Cryptocurrency-Return Model Caused by COVID-19 Shock

    Masato Shinpo, Nagata Yasushi, Hiroki Iwamoto

    20th ANQ congress 2022 

    Presentation date: 2022.10

  • Research on Disappearing Local Municipalities Using Sustainable Development Goals

    Riku Ohta, Hiroki Iwamoto, Yasusi Nagata

    20th ANQ congress 2022 

    Presentation date: 2022.10

  • ローカルSDGs指標を用いた都市の消滅可能性に関する研究

    太田陸, 岩本大輝, 永田靖

    日本経営工学会2022年春季全国大会 

    Presentation date: 2022.05

  • コロナ禍中における在宅勤務満足度の関係分析 -オンラインアンケートによる実証から-

    岩本 大輝, 鈴木 秀男

    日本品質管理学会第50回年次大会 

    Presentation date: 2021.11

  • The Adaptation of Mahalanobis-Taguchi Method To Interval Scale

    Hiroki Iwamoto, Yasushi Nagata

    19th ANQ Congress 2021 

    Presentation date: 2021.10

  • 異常分布を考慮した タクシーの需要予測

    柴田 頼仁, 岩本 大輝, 小森 晴菜, 多賀 友哉, 鈴木 秀男

    日本経営工学会2020年秋季全国大会 

    Presentation date: 2020.10

  • A Study on the Effect of Total Quality Management in Thailand’s Small and Medium-sized Enterprises: The Conceptual Hypotheses Based on the Literature Review

    Sirawit Leelakitkul, Takeshi Ishikawa, Hiroki Iwamoto, Hideo Suzuki

    17th ANQ Congress 2019 

    Presentation date: 2019.10

  • The Relationships Between Human Capital, Quality Management and Corporate Social Performance: A Bayesian SEM Approach

    Hiroki Iwamoto, Hideo Suzuki

    25th International Conference on Production Research  (Chicago, Illinois) 

    Presentation date: 2019.08

  • How do positive attitudes towards external resources promote pecuniary OI?

    Takeshi Ishikawa, Hiroki Iwamoto

    ISPIM Connects Fukuoka 

    Presentation date: 2018.12

  • Personnel-adjusted Added Value (PAV) as an External Evaluation Index

    Hiroki Iwamoto, Hideo Suzuki

    The Asia Pacific Industrial Engineering & Management Systems Conference 2018 

    Presentation date: 2018.12

  • 品質管理と革新的新製品開発の関係分析ー日本製造業の実証からー

    岩本大輝, 石川 岳史, 鈴木 秀男

    日本品質管理学会第48回年次大会 研究発表会  (関西大学 千里山キャンパス)  日本品質管理学会

    Presentation date: 2018.11

  • サプライヤーとの恒常的な連携による 外部資源獲得ノウハウ向上の可能性-実証研究による検証-

    石川岳史, 岩本大輝, 鈴木 秀男

    日本品質管理学会第48回年次大会 研究発表会  (関西大学 千里山キャンパス)  日本品質管理学会

    Presentation date: 2018.11

  • The Influence of Quality and Human Capital Management : A Bayesian SEM Approach

    Hiroki Iwamoto, Hideo Suzuki

    16th ANQ Congress 2018  (Almaty, Kazakhstan) 

    Presentation date: 2018.09

  • 外部評価指標としての人的調整済付加価値-将来利益との関連性分析ー

    岩本大輝, 鈴木秀男

    日本経営工学会 2018年 春季大会 

    Presentation date: 2018.05

  • A Quantitative Approach to HCM Using PAV: Method and Robustness

    Hiroki Iwamoto, SUZUKI Hideo

    24TH International Conference on Production Research  (Poznan, Poland) 

    Presentation date: 2017.08

  • ダイナミックネットワークDEAによる地方銀行の経営統合評価

    大里 怜史, 岩本 大輝, 荻野 健人, 高橋 正子

    日本オペレーションズ・リサーチ学会 

    Presentation date: 2016.03

  • Human capital Management using PAV(Personal adjusted Added Value)

    Hiroki Iwamoto, Masako Takahashi

    3rd INTERNATIONAL CONFERENCE on Advances In Economics, Social Science and Human Behaviour Study  (BANGKOK(THAILAND)) 

    Presentation date: 2015.12

  • PAV(人的支出調整済付加価値)を用いた人材マネジメント

    岩本 大輝, 高橋 正子

    経営情報学会2015年秋季全国研究発表大会  (沖縄コンベンションセンター) 

    Presentation date: 2015.11

  • A Quantitative Approach to Human Capital Management

    Hiroki Iwamoto, Masako Takahashi

    Global Conference on Business & Scial Sciences 2014  (Kuala Lumpur, Malaysia) 

    Presentation date: 2014.12

  • A Quantitative Approach to Human Capital Management

    Hiroki Iwamoto, Masako Takahashi

    International Conference on Production Research Americas 2014  (Lima, PERU)  IFPR

    Presentation date: 2014.08

  • 人的資産マネジメントの評価手法提案

    岩本 大輝, 高橋 正子

    日本経営工学会平成26年度春季研究大会  (東京理科大学野田キャンパス)  日本経営工学会

    Presentation date: 2014.05

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Research Projects

  • Research on corporate measures affecting human capital and evaluation index for contribution of human capital management

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2020.09
    -
    2022.03
     

    Iwamoto Hiroki

     View Summary

    The purpose of this study is to propose models and indicator that help decision-making and management of human capital. By modeling the influence relationships between the working system measures of a company, it was clarified what kind of measures are adopted and in what order is related to the improvement of human capital. Furthermore, by conducting an online questionnaire survey and analyzing it, we demonstrated the factors that affect employee satisfaction in the working system measures.

  • 人的調整付加価値を用いた人的資産管理

    日本学術振興会  科学研究費助成事業 特別研究員奨励費

    Project Year :

    2019.04
    -
    2020.03
     

    岩本 大輝

     View Summary

    昨今,企業収益の源泉は,有形資産から無形資産に移り変わっている.無形資産の中でも,AIや労働生産性などの観点から人的資産とそのマネジメントが特に注目を集めている.本研究は,企業データに対し統計分析を行うことで企業経営者による人的資産マネジメント戦略意思決定の一助となるモデルや知見を得る.本研究は2編からなる.
    1:人的資産マネジメント評価指標の効果検証
    指標効果検証は,人的資産マネジメントを含めた評価指標を提案し,提案指標と将来業績との関連性を示すことで,内部マネジメントにおいて提案指標を用いる有効性の検証を行う研究である.同一対象企業の複数年データを一度に用い分析を行った.これにより,単年データでは検証できなかった,企業内の影響と企業間の影響を同時に分析した.分析結果は,提案指標が将来利益と高い関連性があることを示し,提案手法の有効性を示唆した.
    2:人的資産と企業業績の影響関係検証
    影響関係の検証は,人的資産によって他のどのような要素が変化し,企業業績へと影響を与えるかを検証する研究として計画した.本研究では,ベイジアン構造方程式モデリングを用いた.まず,人的資産・企業の社会的責任活動・品質管理・企業業績・ステークホルダー評価の関係性検証を行った.多くの要素を扱うことで複雑な影響関係を明らかにした.次に,人的資産・企業の社会的責任活動・業績に絞り,それぞれの定義や関係性についてより詳細かつ,要素間の影響関係を解釈しやすいモデルとした.それぞれの要素を構成する項目については,ベイジアン構造方程式モデリングの特徴の1つである,間隔尺度を扱うことが出来る点を活かし従来よりも客観的な指標を用いた.

Misc

  • A Study on the Improvement Targets of Data Envelopment Analysis Models

    Xu Wang, Hiroki Iwamoto, Takashi Hasuike

    2023 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM)     607 - 611  2023.12

    Research paper, summary (international conference)  

    DOI

  • The relationships between human capital, quality management and corporate social performance: A Bayesian SEM approach

    Hiroki Iwamoto, Hideo Suzuki

    Procedia Manufacturing   39   695 - 701  2019

    Authorship:Lead author

     View Summary

    Quality management (QM), Human capital management (HCM) and Corporate Social Responsibility (CSR) fields are closely related. Traditionally QM has been captured in the relationship between companies and customers. However, corporate sustainability is believed to depend on not only customers but also on various company stakeholders. In addition, QM is expected to widely affect its customer effect and the various stakeholder evaluations. CSR has been captured in the relationship between companies and stakeholders. However, Strategic CSR concept is underway. Strategic CSR is a corporate strategy concept of selecting CSR activities according to whether they have a positive impact on corporate performance. Employees who make quality improvements by themselves, are indispensable to increase the effectiveness of QM. Human capital is thought to be one of the most important factors for the success of CSR activities. A lot of previous researches have analyzed on a psychometric basis. However, the approach has problems, such that the psychological influence and actual influence may differ. Therefore, this research analyzes the data from the CSR data book and financial reports which are based on the fact basis by using Bayesian Structural Equation Modeling. It demonstrates the impact of each factor more objectively. Analysis showed how each factor affects each other. Particularly, this study suggests that environmental CSR has a positive impact on corporate performance.

    DOI

  • A quantitative approach to HCM using PAV: Method and robustness

    H. Iwamoto, H. Suzuki

    24th International Conference on Production Research, ICPR 2017     25 - 30  2017

    Authorship:Lead author

     View Summary

    This study focuses on Human Capital Management (HCM). It provides Added value (AV) indicator considering HCM, tools to utilize them and also verify robustness of the tools. The aim of this study is to provide a quantitative technique for managers to make decisions by objectively evaluating HCM as well as projecting profit increase, which is generated by HCM. AV has been often used as a value measurement. However, profit structure supported by tangible assets has been changed to be supported by intangible assets in recent years. It is necessary to redefine AV for considering influence of intangible assets. Therefore, this study provides Personnel adjusted AV (PAV); AV indicator considering HCM. It also creates tools to utilize them using statistical methods. Then, verify the robustness of the tools. In the process of verifying robustness, this study extracts particular indices. It is possible to obtain suggestions for social issue from particular indices.

 

Syllabus

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Teaching Experience

  • 経営データ解析論

    早稲田大学 創造理工学部 先進理工学部 基幹理工学部  

    2023.10
    -
    Now
     

  • 創造理工リテラシー

    早稲田大学 創造理工学部 社会文化領域  

    2023.04
    -
    Now
     

  • 理工学基礎実験1A

    Waseda University  

    2023.04
    -
    Now
     

  • Computer Literacy Application I

    Tokyo Keizai University  

    2022.10
    -
    Now
     

  • Introduction to computer literacy

    Tokyo Keizai University  

    2022.04
    -
    Now
     

  • Multivariate analysis method B

    Waseda University  

    2022.04
    -
    2022.10
     

  • Laboratories in administration engineering(3)

    Keio University  

    2017.10
    -
    2019.03
     

  • Laboratories in science and technology

    Keio University  

    2017.10
    -
    2019.03
     

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Internal Special Research Projects

  • 欠損値補完手法を用いた異常検知手法に関する研究

    2023   永田 靖, 王 緒, 蓮池 隆

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    近年,さまざまなデータ取得が容易になるにつれ,大量のデータに含まれる異常サンプルを自動的に検出する異常検知の重要性が高まっている.マハラノビス・タグチ(MT)法は,パターン認識や異常検出などの問題に対する多変量解析法であり,データ群から異常値を検出する.大量取得したデータの中に不適切な解答が紛れてしまうという課題を抱えるアンケート調査も異常検知が重要な分野である.しかし,アンケート調査などでよく用いられる順序尺度データでは,MT法の異常検出精度が低下することが指摘されている.そこで,順序尺度データに対し,MT法を利用した異常検知手法を提案した.提案手法は,順序尺度の背景に連続分布を仮定し,順序尺度を欠損データの一種とみなし.欠損値の補完後に異常検出を行う.人工データを用いたシミュレーションにより,提案手法の検出精度は,順序尺度の中心付近の回答が多いという限られた環境ではあるが,単位空間が異常データで汚染されているか否かに関わらず,MT法を上回ることを示した.手法提案と実証結果などの研究成果は,国際会議21th Asian network for quality congress 2023にて報告した.予定していた研究に加え,異常検知後に使用する手法として有効なData Envelopment Analysis (DEA)の改善目標の検証を行った.DEAは複数の入力と出力を持つ意思決定単位(DMU)の相対効率を評価する数理計画法であり,指標の単位を勘案せずに分析が可能なため経営分野において良く用いられている.しかし,相対効率を測定するため,異常サンプルの影響を受けやすいという問題がある.そのため,異常検知後のデータに手法を適用するのが望ましい.DEAには代表的な効率値の測定・改善目標の設定法として,加算法と最短距離法がある.この2法を日本の小売企業86社からなる時系列データセットに対して用いることで,手法による改善目標の違いを検証した.結果として,最短距離法の改善目標が非効率なDMUの改善目標において優位であることを示した.研究成果は,国際会議IEEE International Conference on Industrial Engineering andEngineering Management 2023にて報告した.

  • コロナ渦中の在宅勤務満足度に関する影響関係解析

    2022  

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    本研究は,経営者の人的資産マネジメント戦略意思決定の一助となることを目指し,人的資産向上を促す施策の影響関係を明らかにすることを計画していた.しかし,実際に研究を進めるうち,満足度や施策の影響関係が企業業績に与える影響より,人的資産が企業業績に与える影響の定量化の方がより,目的に対する貢献度が高いと考え,研究計画を変更した.結果として,知的資産分野の先行研究であるPulic (2000)が提案しているVAICという,企業知的資産効率の評価指標を人的資産の効率をより含む形へと拡張した指標を提案し,日本の上場企業業績パネルデータを用いた解析により,提案指標の有効性検証を行った.研究成果は国際学会APEMS 2022にて発表した.