SoftBank Group Corp sank into the red for the July-September period, dragged down by losses on its investments in China, the Japanese technology conglomerate said on Monday.

SoftBank reported a 397.9 billion yen ($3.5 billion) loss for the fiscal second quarter, compared with a 627 billion yen profit recorded the same period the previous year. Quarterly sales grew 11 per cent to 1.5 trillion yen ($13 billion).

Tokyo-based SoftBank said its investment portfolio called Vision Fund suffered losses, including the value of its stake in South Korean online retailer Coupang.

But it said it booked gains on its shares in DoorDash, an online food-ordering service based in San Francisco.

SoftBank said the recent crackdown in China on the technology sector weighed on Chinese share prices.

SoftBank’s Vision Fund was hit by a 1 trillion yen ($9 billion) loss in the July-September quarter, according to its chief executive, Masayoshi Son.

Son, who founded the company, acknowledged the latest losses were a big contrast to the booming results it reported for the previous fiscal year.

“We have headed straight into a blizzard in the middle of the winter,” Son told reporters, adding he won’t make excuses.

He said one big factor was a sharp drop in the share price of Chinese e-commerce company Alibaba, in which SoftBank is a shareholder. AP

But he stressed SoftBank's main business was shifting to the Vision Fund and becoming less dependent on Alibaba's performance. However, Vision Fund's Chinese investments also suffered.