It's not a swastika, it's a manji. They're slightly different. It's used on Japanese maps to mark a Buddist temple.

Quote Originally Posted by Wikipedia
Manji is the Japanese name for a Buddhist and Hindu symbol, 卍, (Chinese: Wàn), usually representative of admirable qualities such as peace or intelligence or strength, depending on clockwise or counter-clockwise direction of the arms. As a result of World War II and Nazism, this hooked cross (Hakenkreuz) is usually perceived as the Nazi "hooked cross" swastika, which is usually differentiated from the Manji by a 45 degree rotation and hooked arms facing clockwise