Alpha DX Group Limited announced the cessation of Daiji Yamada as Chief Executive Officer. From 2020 to 2022, Daiji Yamada was Chief Executive Officer of ERC Institute Pte Ltd. From 2020 to 2021, Daiji Yamada was Executive Management Advisor of C2C Global Education Japan (formerly known as Yamanashi Gakuin School Corporation). From 2018 to 2020, Daiji Yamada was Chief Strategy Officer of C2C Global Education Japan (formerly known as Yamanashi Gakuin School Corporation).

From 2017 to 2019, Daiji Yamada was Chief Executive Officer of MasterLingual Academy of Communication, Japan. From 2015 to 2019, Daiji Yamada was Managing Director of Asnaro Challengers, LLC. Mr. Daiji Yamada has tendered his resignation as Chief Executive Officer (CEO) due to disagreements and differences with the controlling shareholder, DiDi Investments Inc. (the Controlling Shareholder), on management and operational matters of the Group as well as number of unpaid expense claims.