Mr. Tezuka is Founder of, and CEO of CTIA which he founded in 2017 in Switzerland and Japan. Currently, with CTIA, Mr. Tezuka focuses on promoting blockchain within the existing business structure and facilitates development with government and businesses. Between 2013 and 2017, Mr. Tezuka ran number of studies in blockchain applications focused on blockchain fundaments and P2P in five major cities in Japan. Prior to this, Mr. Tezuka worked at Hikari Tsushin Co., in corporate sales, retail and business strategy.