Oama Onsen is a historic hot spring area in Oama, Tensui-machi, Tamana City, Kumamoto Prefecture. Known for its tranquil atmosphere and scenic surroundings, it has attracted writers, political activists, and other visitors since the Meiji period. Its most famous literary connection is with Natsume Soseki, one of Japan’s best-known modern novelists.
Oama Onsen is widely known as the model for Nagoi Onsen, the fictional hot spring in Soseki’s novel Kusamakura. Soseki began teaching English at the Fifth Higher School in Kumamoto, now part of Kumamoto University, in 1896. During the New Year period of the following year, he spent several days at Oama Onsen and grew very fond of the area.
Even while studying in London, Soseki recalled his visit in a letter to a friend, writing that he remembered going to Oama. The area’s connection with the writer remains an important part of its cultural appeal.
Oama was also the hometown of Maeda Kazagashi, a political activist associated with Japan’s Freedom and People’s Rights Movement and a member of the first House of Representatives. Thinkers and activists, including Nakae Chōmin, visited him here.
Maeda’s daughter married Miyazaki Tōten, who supported Sun Yat-sen. As a result, Chinese democratic activists also stayed in the area, and Oama became one of the places connected with the Chinese revolutionary movement in Japan.
Oama Onsen was once close to the shores of Shimabara Bay, but land reclamation carried out from the Meiji period onward changed the coastline and left the hot spring farther from the sea. The spring water is classified as a mildly alkaline simple hot spring. It is considered gentle on the skin and is valued for the warmth and relaxation it offers.
Two hot spring facilities are listed in the area. Nakoi-kan, formerly known as Tajiri Onsen, was founded in 1868. After the Second World War, its name was changed to Nakoi, inspired by Soseki’s novel Kusamakura.
Kusamakura Onsen Tensui is a larger leisure facility with a ground-golf course, barbecue facilities, and Kusamakura Sanso, a lodge-style accommodation option. These facilities make it possible to enjoy the hot springs as part of a wider countryside visit.
The Maeda family once owned a second residence in Oama, where Soseki stayed in 1897. The family is believed to have provided models for characters and places in Kusamakura. The Shihoda family in the novel is associated with the Maeda family, while the heroine Nami is said to have been modeled on Maeda Takushi, the daughter of Maeda Kazagashi. Nami’s father, the retired gentleman in the story, is also associated with Maeda Kazagashi.
Maeda Takushi’s younger sister, Tsuchi, married Miyazaki Tōten, who supported Sun Yat-sen. Their son, Miyazaki Ryūsuke, later became widely known through his elopement with Yanagiwara Byakuren, an incident that attracted considerable public attention.
These connections give Oama Onsen a place in both Japanese literary history and the history of political movements linking Japan and China.
Kusamakura Exchange Hall introduces visitors to the world of Soseki’s Kusamakura and explains the history and appeal of the Oama district. Hana no Yakata is a facility where visitors can enjoy seasonal flowers, while the community farm offers opportunities to grow and experience seasonal vegetables.
From JR Tamana Station, take a Kyushu Sanko bus via Ikura bound for Kawachi Onsen Center and get off at Oama Onsen. Buses bound for Oama Onsen or Tensui Shisho also run from Kumamoto Sakuramachi Bus Terminal.
By car, Oama Onsen is approximately 18 kilometers from the KikusuI Interchange on the Kyushu Expressway.