In addition to being a post station on the Tōkaidō, Miya-juku was also part of the Minoji (a minor route which runs to Tarui-juku on the Nakasendō) and the Saya Kaidō. As a result, it had the most hatago of any post station along the Tōkaidō, with two honjin, one wakihonjin and 248 lesser inns.
