Crystal Cruise Lines, most commonly seen as Crystal Cruises, is a Japanese luxury cruise line founded in 1988 and notable for its two medium-sized, high-end ships, Crystal Symphony and Crystal Serenity, which each hold about 1,000 guests. The line is a wholly owned subsidiary of the large Japanese shipping company Nippon Yusen Kaisha. The line has its headquarters in Century City, Los Angeles, California. Readersof Condé Nast Traveler have voted the line best Large-Ship Cruise Line for 16 years. Readers of Travel + Leisure have voted Crystal Cruises World's best for 16 consecutive years. Both ships travel the world and visit destinations. The luxury cruise line also offers a World Cruise on the Crystal Serenity each year of about 110 days in length. Crystal Cruises has announced that their cruise fares will become all-inclusive starting in the Spring of 2012