Tatsuki joined DG ventures in May 2022. He started his career at government-affiliated financial institution, Development Bank of Japan, Inc. He was involved in investment and loan operations for various kinds of businesses from SMEs to large corporations. After that, in the Treasury Department, he engaged in fundraising through the bond issuance including government-guaranteed bonds and sustainability bonds, and was also in charge of investor relations for both domestic and foreign investors. He graduated from the Department of Economics, University of Tokyo.