About
Ryo Ishizuka is the co-founder and CEO of Mercari, a hassle-free peer-to-peer mobile marketplace app. After founding the company in Japan and following its successful launch, Ryo leads Mercari's international expansion as the company grows globally. Prior to founding Mercari, Ryo was the Chief Architect at RockYou, a Silicon Valley startup backed by Sequoia. At RockYou, he was responsible for developing the core infrastructures to support its rapidly growing traffic, serving more than 20 billion PVs per month. He later served as COO at RockYou Asia to lead its Asian expansion. Born in Japan and raised in the US, Ryo has spent his life constantly moving and building bridges between the two countries.
Position in the VCSift Database
- • 35 investors at Techstars are tracked.
- • 38 investors hold the Mentor role in VCSift. Ryo Ishizuka is one of them.
- • 7,285 investors are based in San Francisco, California, United States.
Data sourced from 410,343 investor profiles. Updated July 2026.
Investment Focus
- Location
- San Francisco, US
Contact Information
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