NEW YORK/TOKYO, Sept 29 (Reuters) - Japan's SoftBank Group Corp (9984.T) is cutting around 150 staff globally at its Vision Fund unit and SoftBank Group International, a person familiar with the matter said, as CEO Masayoshi Son retrenches following huge loss on his tech bets. Register now for FREE unlimited access to Reuters.com RegisterThe cuts will affect staff in the investment teams and back-office staff in departments such as finance and legal, a second source said. The cuts also encompass SoftBank Group International, which was led by Marcelo Claure before he exited the firm and which manages other group investments. Vision Fund has radically scaled back investing activity, with Son saying SoftBank's second Vision Fund would primarily manage its existing portfolio. SoftBank has sold down its stake in key asset Alibaba Group Holding Ltd (9988.HK) and outlined plans to list Arm.

---