OSAKA -- Osaka Mayor Takafumi Isomura will lead a 15-member delegation to San Francisco next week for an eight-day trip to commemorate the 40th anniversary of the Osaka-San Francisco sister city relationship.

During their stay in San Francisco, Isomura and other members of the delegation will meet with San Francisco Mayor Willie May Brown. The group will then travel to Chicago, another of Osaka's sister cities. The visit to Chicago may involve discussions with local city officials about Chicago's interest in hosting the 2008 Summer Olympic Games. The delegation will leave Japan on April 17 and return on April 24.