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The Kitayama (北山) Family is a very wealthy and powerful in the area of Business and Finance.
The Kitayama Family owns a villa with on a private beach in Ogasawara, Tokyo. 
The Kitayama Mansion is a wide and grand area. 
There are no companies that deal in the business of weapons directly under the umbrella of the corporate group of the Kitayama Family, from bullets to fighter aircraft, though they do hold the greatest share of intermediate goods necessary for the production of weapons.