Keita participated in several internships as a university student, helping launch a programming education service at CyberAgent and introducing a sentiment analysis platform for video services at DeNA. He later joined Mercari’s research and development organization—known as R4D—as an intern. Upon graduating from university in 2018, he joined Mercari full time as a blockchain engineer and was involved in the MercariX project at R4D. Keita then moved to Merpay, where he served as a PM on teams working on distributed ledger development, AML systems, and credit design. In April 2021, he moved to Mercoin as the director of the Product Division. After working as Chief Product Officer, he assumed his current role as Representative Director, Chief Executive Officer of Mercoin in April 2023.