It said the Taiwan coast guard vessels fired water from high-pressure hoses in return . NEW : Taiwanese ships leave waters claimed by Japan after water cannons fired . Japan 's Coast Guard says it warned the vessels to leave its territorial waters . Comment: Taiwan , China and Japan all claim ownership of island chain .
NEW : Taiwanese ships leave waters claimed by Japan after water cannons fired . Japan 's Coast Guard says it warned the vessels to leave its territorial waters . Comment: Taiwan , China and Japan all claim ownership of island chain .