Serial entrepreneur. Akiyama has created numerous new ventures since elementary school through proposals to companies. Won the SoftBank Innovation Venture new business proposal contest at previous employer, SoftBank. While driving new ventures at SoftBank, he also conceived many projects only feasible outside the company, providing business ideas to large corporations, the United Nations, and governments. Initiated over 40 projects in total.

Following a proposal to the Cabinet Office for a food loss matching cloud system, Akiyama founded a support organization for children's cafeterias. Projects co-created with others often involved marketing, frequently achieving viral buzz with over 10 million impressions per post, as well as topping Twitter trends and appearing on Yahoo! Topics. Frequently utilized cross-marketing with TV and newspapers tailored to project characteristics.

Beyond creating social businesses, his proactive role in solving social issues with the UN and government led publishers to commission him to supervise SDGs books and toys. When asked to supervise the SDGs book “Children's SDGs,” he counter-proposed integrating marketing efforts. Akiyama allocated all royalties from the supervision to cover the cost of sending food at risk of waste to children's cafeterias nationwide. By including this initiative in the book itself, he elevated it from a mere SDGs book to an “SDGs project where readers can participate.” As a result, it was covered by various media outlets and became a bestseller, ranking #1 on Amazon (15th printing as of October 2022). Translated into multiple languages, it is also said to be the world's best-selling SDGs book. Additionally, he is active in various fields including university lectures, speaking engagements, writing, policy formulation, and supervising and producing television programs.

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