Inujima ("dog island") is a small island off Okayama in the Seto Inland Sea that is named after a large rock resembling a sitting dog. Like nearby Naoshima Island, Inujima has become known as a site for modern art in recent years.

Before turning to modern art, Inujima served mostly as an industrial site. During the feudal age it produced granite blocks for castle construction, and in the early 20th century a copper refinery was supposed to bring prosperity and people to the island. However, copper prices plummeted within ten years of the refinery's opening and led to its premature closure and a drop in the island's population.

After its closure the refinery was not demolished, and despite being out of business for almost a century, its ruins still characterize Inujima's landscape. Designated as a "heritage of industrial modernization", the ruins with their exposed brick walls, overgrown power plant and crumbling smokestacks can now be explored by tourists.

In 2008, the refinery ruins were converted into the Inujima Art Project Seirensho ("seirensho" is Japanese for "refinery") by tastefully incorporating an art gallery into the ruins, mostly underground and by using local materials such as granite and discarded bricks from the refinery. Among the small number of artworks on display are an intriguing tunnel of mirrors and a tribute to the late novelist Mishima Yukio, which consists of pieces of Mishima's former residence suspended midair.

Admission tickets to the art site are purchased at a reception building next to the ferry terminal, a 200 meter walk from the refinery's gates. While in the past it was necessary to make advance reservations for a guided tour of the art site, it is now possible to explore the ruins and art gallery on an individual basis without prior appointment.

The rest of Inujima is occupied by a small rural village, which is home to about one hundred people. A beach and campground can be found on the opposite side of the island, about a ten minute walk from the ferry terminal. During the Setouchi Art Festival 2010, Inujima served as one of the festival's seven island venues. Four art houses were built for the festival and remain scattered around Inujima's village for the enjoyment of visitors even after the end of the festival.