Takeshima/Dokdo red stamp ship/朱印船

In comment #406, you say that the Japanese fishermen to Ulleungdo were given “voyages passage given to those travelling to foreign countries.” They were given both exclusive rights to fish in Ulleungdo and also written passports (往来手形 ourai-tegata）The latter was required by all travelling Japanese. The Tokugawa shogunate kept a strict watch over the comings and goings of people within Japan. That was their method for maintaining peace in Japan.two cent at marmot

As for the”red stamp” on the permits, that just represents that the orders/permission/grants/etc. came from the Shogun. Permits issued by the local lords have black stamps. While it is true that only the shogunate can issue travel permits to foreign countries　for red-stamp ships (朱印船), all such ships had to set sail from Nagasaki, since it was the only port open to foreign countries. However, ships to Chosun were exempt from this law since the Tsushima han had historically dominated commerce with Chosun and required only the black stamp of the Tsushima lord, and all commerce with Chosun was carried on through Tsushima. The fact that the Murakami and Oya families did not have to set sail from Nagasaki or Tsushima indicates that fishing on Ulleungdo was not considered to be activities involving foreign countries, but rather that they were activities on “the red stamped land (朱印地),” which requires a red-stamp permission from the Shogun for access.two cents at marmot