Many are located around the Iwamura Historical Museum, which is in the mountains a reasonable walk from Iwamura Station.
You can also take a bus from Iwamura Station, which runs a few times a day.

This area is where the former residence of the lord of the Iwamura domain was located, and the turrets have been restored to create a plaza-like space.
On the mountain behind you, you'll find the remains of Iwamura Castle, one of Japan's three major mountain castles.

Many are located around the Iwamura Historical Museum, which is in the mountains a reasonable walk from Iwamura Station.
You can also take a bus from Iwamura Station, which runs a few times a day.

This area is where the former residence of the lord of the Iwamura domain was located, and the turrets have been restored to create a plaza-like space.
On the mountain behind you, you'll find the remains of Iwamura Castle, one of Japan's three major mountain castles.