The five-star RIHGA Royal Hotel Osaka, which features a ballroom for up to 2,000 guests theatre-style, and its sister hotel in Tokyo have joined as affiliates. Hotels in Hiroshima and Kyoto have also joined the group.
World Hotels managing director Robert Hornman said: "RIHGA Royal Hotels is renowned for earning the patronage of the Japanese imperial family as well as royalty, heads of state and key government officials from around the world. This partnership significantly strengthens our presence in Japan, an exciting attraction for both the leisure travel and MICE markets."
RIHGA Royal Hotels managing director executive Toru Kawasaki added: "We are looking forward to extending our marketing and distribution reach globally through a successful long-term strategic partnership with World Hotels."