1. Expansion of data traffic. White paper on Japanese telecommunication in 2018. https://www.soumu.go.jp/johotsusintokei/whitepaper/ja/h30/pdf/30honpen.pdf. Accessed 26 Dec 2019.
2. Japanese E-commerce market research in 2018. (April 2019). https://www.meti.go.jp/press/2018/04/20180425001/20180425001.html. Accessed 26 Dec 2019.
3. Market size of influencer marketing in Japan. (March 2019). https://digitalinfact.com/release190328/. Accessed 26 Dec 2019.
4. The state of influencer marketing 2019: benchmark report. https://influencermarketinghub.com/influencer-marketing-2019-benchmark-report/. Accessed 26 Dec 2019.
5. Eroglu, F., & Bayraktar, E. (2019). Utilization of online influencers as an experimental marketing tool: A case of Instagram micro-celebrities. International Journal of Social Research, 12(63), 1057–1067.