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Analysis of consumer expectations of product lifetimes and their determinants: towards longer product lifetimes

Research Project

Project/Area Number 18H03420
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 64050:Sound material-cycle social systems-related
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

Oguchi Masahiro  国立研究開発法人国立環境研究所, 資源循環領域, 主幹研究員 (20463630)

Co-Investigator(Kenkyū-buntansha) 田崎 智宏  国立研究開発法人国立環境研究所, 資源循環・廃棄物研究センター, 室長 (10353541)
醍醐 市朗  東京大学, 大学院工学系研究科(工学部), 特任准教授 (20396774)
村上 進亮  東京大学, 大学院工学系研究科(工学部), 准教授 (40414388)
西嶋 大輔  福島大学, 共生システム理工学類, 講師 (00827959)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords期待使用年数 / 耐久消費財 / 要因分析 / 長期使用 / 循環経済 / 製品使用年数
Outline of Final Research Achievements

We estimated the expected lifespan by consumers for several types of electrical and electronic equipment in Japan based on questionnaire surveys. The estimated expected lifespans showed longer values by approximately 50% than the actual lifespans, suggesting that the actual product lifespans do not meet the consumers' expectations and the product lifespan may potentially be extended by eliminating the gap between the expected and actual lifespans. The detailed analysis of actual product lifespan showed that no significant difference was observed in actual lifespan between the cases of replacement due to the failure of old products and upgrading to better new products. The result suggested that physical deterioration and relative functional obsolescence of products contribute equally to the gap between expected and actual lifespans. A similar estimation were conducted in Thailand and the results showed that the expected lifespan of products in Thailand was shorter than that in Japan.

Academic Significance and Societal Importance of the Research Achievements

本研究では、製品の長期使用のポテンシャルを示す期待使用年数と実使用年数のかい離とその要因についての分析結果を示した。日本およびアジア途上国においては製品の期待使用年数に関する定量的な調査、推定自体が行われておらず、これを示したことは日本およびアジア途上国における製品の長期使用実現に向けた知見を提供するという点において社会的意義が大きい。また、循環経済の実現に向けた取り組みが進んでいる欧州等において先行して報告されている期待使用年数との国際比較が可能になったことに加え、それら先行研究では整理されていなかった異なる定義の期待使用年数の違いを示したことに学術的意義がある。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 8 results)

  • [Int'l Joint Research] Nottingham Trent University(英国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Consumer's perceptions toward longer product use and their influence on product lifespan2020

    • Author(s)
      Yamamoto H., Murakami S.
    • Journal Title

      Proceedings of the 3rd PLATE Conference

      Volume: なし Pages: 873-878

    • Related Report
      2020 Annual Research Report
    • Open Access
  • [Presentation] 施策実施とその製品寿命への影響をリンクさせた製品のストック・フローおよび環境負荷の推計モデルの構築2022

    • Author(s)
      西嶋大輔, 小口正弘
    • Organizer
      第17回日本LCA学会研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] How much can increase in expected product lifetime contribute to extending actual product use duration? A case study of refrigerators2021

    • Author(s)
      Nishijima D., Oguchi M.
    • Organizer
      4th PLATE 2021 Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lifetime of consumer appliances and its factors: Findings from a Japanese national government's survey2021

    • Author(s)
      Yamamoto H., Murakami S., Oguchi M., Nishijima D.
    • Organizer
      The 14th Biennial International Conference on EcoBalance (EcoBalance 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 消費者の期待寿命の変化が製品の使用期間に与える影響2021

    • Author(s)
      西嶋大輔, 小口正弘
    • Organizer
      第16回日本LCA学会研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 製品の使用価値が製品使用期間に与える影響の分析2021

    • Author(s)
      山本悠久, 村上進亮
    • Organizer
      第16回日本LCA学会研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Quantifying impacts of consumers' expectation of product lifespan on product use duration in the circular economy2020

    • Author(s)
      Nishijima D., Oguchi M.
    • Organizer
      Electronics Goes Green 2020+
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A product lifetime model for assessing the effect of product lifetime extension behavior by different consumer segments2019

    • Author(s)
      Oguchi M., Tasaki T., Terazono A., Nishijima D.
    • Organizer
      The 3rd Product Lifetimes And The Environment Conference (PLATE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Constructing an assessment framework for environmental and economic impacts of product price increase associated with product lifetime extension design policy2019

    • Author(s)
      Nishijima D., Nansai K., Oguchi M.
    • Organizer
      The 3rd Product Lifetimes And The Environment Conference (PLATE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Categorization of products and their lifespan: from consumer's perspectives2019

    • Author(s)
      Yamamoto H., Murakami S.
    • Organizer
      The 10th International Conference on Industrial Ecology (ISIE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 製品使用期間の推定と持続可能な資源利用への含意2019

    • Author(s)
      山本悠久,村上進亮
    • Organizer
      資源・素材学会 関東支部 第16回「資源・素材・環境」技術と研究の交流会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Consumer’s perceptions toward longer product use and their influence on product lifespan2019

    • Author(s)
      Yamamoto H., Murakami S.
    • Organizer
      Product Lifetime and the Environment (PLATE) 2019 Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 製品の長期使用に対する消費者意識の研究2019

    • Author(s)
      山本悠久, 村上進亮
    • Organizer
      第14回日本LCA学会研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Product lifespan and purchase decision: A literature review2018

    • Author(s)
      Yamamoto, H., Murakami, S.
    • Organizer
      EcoBalance 2018: The 13th Biennial International Conference on EcoBalance
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 消費者の分類を通した、製品の使用・廃棄行動の適正化へのチャネルの特定2018

    • Author(s)
      山本悠久, 村上進亮
    • Organizer
      エコデザイン・プロダクツ&サービス シンポジウム2018 (EcoDePS 2018)
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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