The top Founders in IT in Japan

May 9, 2025
5 min read
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Japan has long been recognized as a global powerhouse in technology and innovation. The country’s information technology (IT) sector is driven by visionary founders whose creativity and leadership have shaped not only Japan’s digital landscape but also influenced the global tech ecosystem. This article highlights some of the most prominent and impactful IT founders in Japan, exploring their journeys, achievements, and contributions to the industry.

Masayoshi Son

Company: SoftBank Group

Masayoshi Son is a Japanese billionaire technology entrepreneur and investor, best known as the founder and CEO of SoftBank Group. He has played a pivotal role in shaping Japan’s tech industry and is renowned for his bold investments, including in Alibaba and ARM. Son is known for his visionary approach and ambitious projects, such as the Vision Fund, one of the world’s largest technology-focused venture capital funds. His leadership has positioned SoftBank as a global powerhouse in telecommunications and technology.

Hiroshi Mikitani

Company: Rakuten

Hiroshi Mikitani is the founder and CEO of Rakuten, a leading Japanese e-commerce and internet company. Under his guidance, Rakuten expanded from an online marketplace to a global conglomerate with interests in fintech, digital content, and telecommunications. Mikitani is recognized for his innovative management style, including the adoption of English as Rakuten’s official language. He is also an advocate for entrepreneurship and technological advancement in Japan.

Tadashi Yanai

Company: Fast Retailing (Uniqlo)

Tadashi Yanai is the chairman and CEO of Fast Retailing, the parent company of Uniqlo, one of the world’s largest apparel retailers. Yanai transformed a small family business into a global fashion powerhouse through a focus on innovation, quality, and affordability. He is known for his strategic vision and relentless pursuit of global expansion. Yanai is consistently ranked among Japan’s wealthiest and most influential business leaders.

Toru Yamamoto

Company: GMO Internet

Toru Yamamoto is the founder and CEO of GMO Internet, a leading Japanese company specializing in internet infrastructure, online advertising, and financial technology. Under his leadership, GMO Internet has grown into a diversified group serving millions of clients worldwide. Yamamoto is recognized for his forward-thinking approach and commitment to innovation in the digital economy. He remains an influential figure in Japan’s tech ecosystem.

Yoshikazu Tanaka

Company: GREE

Yoshikazu Tanaka is the founder and CEO of GREE, a pioneering Japanese social networking and mobile gaming company. He launched GREE in 2004 while still in his twenties, quickly becoming one of Japan’s youngest self-made billionaires. Tanaka is credited with revolutionizing Japan’s mobile gaming industry and expanding GREE’s presence internationally. His entrepreneurial journey has inspired a new generation of tech innovators in Japan.

Hiroshi Ishiguro

Company: Vstone

Hiroshi Ishiguro is a renowned Japanese roboticist and the director of the Intelligent Robotics Laboratory at Osaka University. He is also affiliated with Vstone, a company known for developing advanced robots and artificial intelligence technologies. Ishiguro is famous for creating lifelike humanoid robots and exploring human-robot interaction. His groundbreaking work has garnered international acclaim and pushed the boundaries of robotics research.

Takeshi Natsuno

Company: DeNA

Takeshi Natsuno is a prominent Japanese entrepreneur and executive, known for his leadership at DeNA, a leading mobile and online services company. He played a key role in developing the i-mode mobile internet platform at NTT DoCoMo, which revolutionized mobile communications in Japan. At DeNA, Natsuno has helped drive innovation in gaming, e-commerce, and social media. He is widely recognized for his impact on Japan’s digital landscape.

Kenji Kasahara

Company: mixi

Kenji Kasahara is the founder of mixi, one of Japan’s earliest and most popular social networking services. He launched mixi in 2004, shaping the way Japanese people connect and interact online. Under his leadership, mixi became a cultural phenomenon and a driving force in Japan’s social media evolution. Kasahara continues to be an influential figure in the country’s tech sector.

Taizo Son

Company: Mistletoe

Taizo Son is a Japanese serial entrepreneur and investor, and the younger brother of Masayoshi Son. He founded Mistletoe, a venture capital and incubation firm focused on supporting startups and fostering innovation. Taizo has also co-founded several successful companies, including GungHo Online Entertainment. He is dedicated to nurturing the next generation of entrepreneurs and advancing technology-driven social change.

Takeshi Idezawa

Company: LINE

Takeshi Idezawa is the CEO of LINE Corporation, the company behind one of Asia’s most popular messaging apps. Idezawa joined LINE in its early days and has played a crucial role in its rapid growth and international expansion. Under his leadership, LINE has diversified into fintech, digital payments, and AI-driven services. Idezawa is recognized for his strategic vision and commitment to digital innovation.

Conclusion

The remarkable achievements of Japan’s top IT founders have been instrumental in propelling the nation to the forefront of technological advancement. Their pioneering spirit and relentless pursuit of innovation continue to inspire the next generation of entrepreneurs. As Japan’s IT industry evolves, these leaders’ legacies will undoubtedly endure, shaping the future of technology both within Japan and around the world.

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