Japanese Prime Minister Kan Naoto has resigned. The ruling Democratic Party of Japan (DPJ) will hold a presidential election Aug. 29 to replace him; the winner will become the next prime minister of Japan. The new prime minister will face many challenges; among his foreign policy priorities is getting the Japan-China relationship back on track. Relations have been tense since a Chinese fishing boat collided with Japanese Coast Guard boats near the disputed Senkaku Islands in September of last year. That sore continues to fester as Chinese boats continue to enter disputed waters.