Mitsui Sumitomo Insurance Co. Ltd. is boosting the capital in its Bermuda subsidiary.

The Tokyo-based insurer is adding $100 million to the capital of MS Frontier Reinsurance Ltd., bringing the reinsurer's capital to $300 million. MS Frontier writes property catastrophe reinsurance.

Mitsui Sumitomo said in a statement that "the natural catastrophe reinsurance market is turning around" and it expects that the demand for "highly-secured reinsurance capacity would remain very strong".

MS Frontier's additional capital gives it the ability to take advantage of market conditions and "react in a more agile and flexible manner", the insurer said.