Nakiri Castle, Japanese castle in Shima, Japan.

Nakiri Castle is a small hilltop castle site at Nakiri in Ōgawa-chō, Shima, Mie Prefecture, built on a coastal terrace used as a natural defence. Its scale suits the name fort, and it is sometimes called Nakiri Fort. Only a few stone walls thought to date from its period remain; the site is now laid out as a park.

Nakiri Castle was founded during the Nanboku-chō period by the Kawazura clan, local strongmen who used the coastal terrace as a natural defence. In the Jōji era (1362–1368) it was taken by Kuki Takayoshi, who was advancing east from Kuki in Kii Province. It remained a Kuki stronghold until the sixth head, Yoshitaka, built Toba Castle in 1594.

The ruins sit on a hill where visitors can still look out over the sea and surrounding villages, much as those who once held the castle did. The stone foundations and earthworks that remain give a sense of how the site once commanded the landscape.

The site requires a short uphill walk on uneven ground, so sturdy footwear is a good idea. Information panels on site explain the layout of the former castle, which helps to make sense of what you are looking at.

The castle was also called Nakiri Fort, since its size was closer to a fort than a castle. The site is now a park, and only a few stone walls said to date from the period recall the former stronghold.