A decline in tourists from Japan after the earthquake and tsunami last month may reduce cash flow at Hawaii’s hotels, making it costlier for owners to refinance debt coming due this year and next.

The disaster may have set back a recovery by the islands’ hotels “by one to two years,” Mary MacNeill, a managing director at Fitch Ratings in New York, said Tuesday by phone. Talks to restructure an $848 million commercial mortgage-backed security that includes the Sheraton Waikiki, the largest Hawaii hotel loan tracked by Fitch, have been “sidelined,” she said.

“Many CMBS loans in Hawaii will have difficulty refinancing without the borrower contributing significant additional equity,” MacNeill said. “These hotel loans have experienced significant performance declines and have been performing well below their underwritten cash flows at issuance.”

Several Japanese group bookings have been canceled, said Joe Toy, president of Hospitality Advisors LLC, a Honolulu-based industry consulting firm. They include the Amway Japan conference with 2,000 attendees that had been scheduled for later this month at the Sheraton Waikiki.

Besides cutting cash flow, the drop-off in tourism may put pressure on potential sale prices for some hotels, he said.

“There are loans that are maturing this year and there are some properties that were prepared to sell to third parties,” Toy said. “The limited supply of Hawaii hotel rooms is going to help in the longer term, but right now there’ll be more bias toward lower pricing or more conservative loan restructuring.”

About 1.2 million Japanese visited Hawaii last year, accounting for 18 percent of tourists, according to the Hawaii Tourism Authority. HTA expects year-over-year Japanese travel to the state to fall 45 percent this month, 35 percent next month and 30 percent in June.

Fitch rates 12 loans on hotels in Hawaii, with 11 greater than $20 million and the majority of the debt maturing in 2011 or 2012, the company said.

The biggest, known as the Kyo-ya CMBS, was originally backed by eight properties, including five in Hawaii, according to a research note released by the firm Friday. It’s set to be paid off on

July 9, Fitch said.

“The company’s Hawaiian hotel properties are highly attractive to national and international tourists and business travelers, and global demand should significantly mitigate any short-term disruption in Japanese tourism,” Greg Dickhens, president of Kyo-ya Hotels and Resorts, which is owned by New York-based investment firm Cerberus Capital Management LP, said in a statement. “Various alternatives including financing, refinancing and dispositions are being considered.”

A $250 million loan, maturing on Jan. 1, 2014, and backed by the Four Seasons Resort Maui, and a $387 million loan secured by the Grand Wailea Resort Hotel & Spa also could be affected by the decline in Japanese tourism, according to Fitch. On Feb. 1, the Grand Wailea was one of five luxury resorts that filed for bankruptcy after lenders including Paulson & Co., the New York-based hedge fund run by John Paulson, seized them from Morgan Stanley’s real estate funds.

Japan Airlines Corp., the nation’s flagship carrier, slashed flights to China, South Korea and Hawaii on March 28 after the earthquake and nuclear crisis caused a 25 percent drop in its international passengers.

Marriott International Inc., the largest U.S. hotel chain by revenue, operates 17 hotels in Hawaii, including the Waikiki Beach Marriott Resort & Spa and the Ritz-Carlton Kapalua. Laurie Goldstein, a spokeswoman for the Bethesda, Md.-based company, said it was gathering information on its island properties and wouldn’t discuss details until it releases earnings in two weeks.

Starwood Hotels & Resorts Worldwide Inc. manages 11 properties in the islands, including the Sheraton Waikiki and the Royal Hawaiian Waikiki.

“Cancellations have slowed,” Marsha Wienert, a spokeswoman for the White Plains, N.Y.-based company,  and the former state tourism liaison, said in an email. “Thankfully, mainland (North America) demand is strong.”

Hotel occupancy on Oahu rose to 84 percent in the first two months of the year, the highest level among the top 25 markets, from 76 percent in the same period last year, according to Smith Travel Research Inc.