Consulting Report
17 Sep 2025

日本におけるオンライン広告 ― 中小企業の視点

世界第3位の広告市場である日本では、オンライン広告市場の成熟が急速に進んでいます。日本には、オンライン広告業界を成長させる膨大なポテンシャルが存在しています。とりわけ、経済の要を成すセグメントである中小企業にとっては、その利益が連鎖的に拡大することが期待されるでしょう。

日本は他の国と比べて独自の位置付けにあり、依然として広告支出の約半分を従来型の媒体が占めています。今後、日本のオンライン広告産業は大きな成長余地を持ち、その波及効果として特に経済の重要な一角を担う中小企業に大きな利益をもたらす可能性があります。

Googleとの協業のもと、オックスフォード・エコノミクスは日本国内9業種にわたる約1,000社の中小企業を対象に、オンライン広告の戦略、成長計画、導入における障壁、投資収益の実態について調査を行いました。

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The experts behind the research
  • John Reiners

    John Reiners

    Managing Editor, EMEA, Thought Leadership, Oxford Economics
    John Reiners

    Managing Editor, EMEA, Thought Leadership, Oxford Economics

    John oversees Thought Leadership projects with EMEA-based clients. He works across business sectors and disciplines, but specialises in issues relating to strategy and business operations, such as sustainability, digital transformation, employment and skills, finance, and performance management. He has directed the Thought Leadership contribution on some of Oxford Economics’ largest and most complex research programmes, for global consultancies and corporates, including Accenture, the Adecco Group, Cognizant, EY, Fujitsu and YouTube. Often this is in collaboration with his economist colleagues to blend qualitative and quantitative analysis, and to explore the impact of corporate actions at a business, industry and economy level.

    John joined Oxford Economics in 2014, after 25 years as a Financial Controller, financial management consultant and, most recently, a thought leadership expert for IBM’s Institute for Business Value, focused on global public sector issues. John then worked on the independent Digital Government Review as input to the UK General Election. He is an Economics graduate from Sussex University and a Chartered Management Accountant (ACMA).

  • Alice Pickthall

    Alice Pickthall

    Senior Research Manager, Thought Leadership
  • Sundus Alfi

    Sundus Alfi

    Senior Editor, Thought Leadership
    Sundus Alfi

    Senior Editor, Thought Leadership

    Sundus manages research programs for the Thought Leadership team, focusing on topics like generative AI, customer experiences, sustainability, and the future of work. She is involved in all aspects of research, from drafting hypotheses and designing global executive, employee, and consumer surveys to analyzing large datasets and reporting on the results in briefing papers and graphics. She also has experience conducting interviews, writing case studies, and presenting her research in webinars.

    Sundus graduated from the University of North Carolina at Chapel Hill in 2018 with degrees in Public Policy and Economics.

  • Daniel Filippi

    Daniel Filippi

    Research Manager, Thought Leadership
    Daniel Filippi

    Research Manager, Thought Leadership

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