1993 年 1993 巻 43 号 p. 243-269,en9
Most scholars have suggested that the control of the five highways and other routes throughout Japan by the Shogunate invaded the rights of feudal domains. However, each feudal domain also had some control over their part of each route, resulting in a double rule over the routes. This paper proposes to look at the "double rule" over the ferry portions of the routes by comparing a ferry route under Shogunate control with one that wasn't.
I analyzed the two ferries on the Kiso-river in the Owari-domain. One of these was the Uchida-ferry on the Inagi-route, which was not under Shogunate control. The other, the Okoshi-ferry on the Mino-route, was under Shogunate control and was often used by people in the privileged class, including feudal lords travelling to and from the capital, under the alternate attendance system. Because of the high rank of the travellers along the Okoshi-ferry route, and the heavier traffic there in general, the Owari domain provided more ferryboats, allowances for the ferrymen, etc. for the Okoshi-ferry than the Uchida-ferry. Moreover, travellers of the highest rank, called "Gochiso-daimyo" were allowed to cross for free. On the other hand, the only services that the Shogunate provided for the Owari ferry routes, were patrolling the routes, making the Owari domain install "Kosatsu" bulletin boards, and giving advance notice of the movement of high-ranking persons. A later Shogunate, however, provided some exceptional financial assistance to the Okoshi-ferry route, but the Owari domain embezzled part of the funds. To sum, the Shogunate established an indirect, rough control of the important ferry-routes in the domains, while each domain kept direct supervision over them, resulting in a kind of "double rule" over some routes.