Nomura Principal Finance Co. may revise upward the size of its planned equipment investment in failed theme park operator Huis Ten Bosch Co., an executive of the investment arm of the Nomura Securities group said.

Masahiro Tsuda, head of investment at Nomura Principal Finance, said in a recent interview with Kyodo News that investment in new facilities may be bigger than the initially announced level, which was described as "a few billion yen more than 10 billion yen."

On Sept. 3, the trustees of Huis Ten Bosch announced they had selected Nomura Principal Finance, a wholly owned subsidiary of Nomura Holdings Inc., as sponsor of the company's rehabilitation. The contenders were narrowed down to four firms, among them U.S. investment firm Ripplewood Holdings LLC.