Tokyo Gas Co. said Wednesday its group pretax profits rose 20.6 percent to 80.63 billion yen in the business year to March 31 on strong gas sales and cost-cutting efforts.

The yen's weakening during the past fiscal year led to larger import costs for raw materials. Their profits expanded, however, due to cost-cutting and improved management, the utility said.

On a consolidated net basis, Tokyo Gas's profits surged 88.1 percent to 51.91 billion yen. The amount of extraordinary losses fell sharply while that of extraordinary profits jumped, according to the company.