Being the third-largest island of Japan's five main islands and the most southerly of the four largest islands, there are many fun things to do in Kyushu, Japan. In the past, it has been known as Kyūkoku (九国, "Nine Countries"), Chinzei (鎮西, "West of the Pacified Area") and Tsukushi-no-shima (筑紫島, "Island of Tsukushi"). The historical regional name Saikaidō (西海道, lit. West Sea Circuit) referred to Kyushu and its surrounding islands. Kyushu has a land area of 36,782 square kilometres (14,202 sq mi) and a population of 14,311,224 in 2018.

In the 8th-century Taihō Code reforms, Dazaifu was established as a special administrative term for the region.

The island is mountainous, and Japan's most active volcano, Mount Aso at 1,591 metres (5,220 ft), is on Kyushu. There are many other signs of tectonic activity, including numerous areas of hot springs. The most famous of these are in Beppu, on the east shore, and around Mt. Aso in central Kyushu. The island is separated from Honshu by the Kanmon Straits. Being the nearest island to the Asian continent, historically it is the gateway to Japan.

The name Kyūshū comes from the nine ancient provinces of Saikaidō situated on the island: Chikuzen, Chikugo, Hizen, Higo, Buzen, Bungo, Hyūga, Osumi, and Satsuma.

Parts of Kyushu have a subtropical climate, particularly Miyazaki prefecture and Kagoshima prefecture. Major agricultural products are rice, tea, tobacco, sweet potatoes, and soy; also, silk is widely produced.

Besides the volcanic area of the south, there are significant mud hot springs in the northern part of the island, around Beppu. The springs are the site of occurrence of certain extremophile microorganisms, which are capable of surviving in extremely hot environments.