Mitsui O.S.K. Lines is set to order two new mid-sized cruise ships, according a report by Nikkei Asia.

The report said that President and CEO Takeshi Hashimoto said the company was eyeing a $710 million investment in two ships as part of a plan to diversify operations.

The company already operates one ship in the 1990-built Nippon Maru, which could be retired in favor of the two new ships. The brand serves the domestic Japanese market with a variety of short- and long-itineraries from Japanese homeports.

“We will build two ships at first, and if things go well, we are thinking of expanding to four,” Hashimoto said in the article.