Also in 1643, he was involved in the "Nanbu Incident", when ten sailors (including the captain) of the Dutch Ship "Breskens" were taken into custody by local Japanese officials. after the "Breskens" had sailed unannounced into the Bay of Yamada in Northern Honshu. The Dutch ship had visited the bay once before seeking to resupply after a heavy storm, and quickly left after trading with the locals for two days. However, when the "Breskens" returned in July the ship and its crew were seized by local authorities for its violation of Japan's national isolation policy. This sparked an international incident, and at the time the "rōjū" serving the shogunate were Sakai Tadakatsu, Matsudaira Nobutsuna, and Inoue Masashige. The Shogunal government went to great lengths to use the Nambu incident to pressure the Dutch into sending an embassy to Edo, by which it attempted to use the incident as means of securing domestic legitimacy. What was for the Dutch merely a cynical gesture aimed at preserving their trade relations with Japan was for the shogunate an opportunity to parade twenty-two Dutchmen in red and white striped uniforms through the streets of Edo, impressing upon a domestic audience the fiction that the shogunate's authority was recognized throughout the world.