Sabakoyu Onsen

From Fukushima Station, the Fukushima Kotsu Iizaka Line tram runs northeast for about thirty minutes, rattling through the city's outer neighborhoods before settling into the rhythm of a proper rural line. Iizaka-Yumachi Station deposits you directly into the onsen town, and the first thing you notice is how the streets still feel like the Taisho era, old wooden facade buildings and stone lanterns along the main path, even though everything around it has been through decades of ordinary Japanese development. The town did not give up on its bones.

Sabakoyu is Japan's oldest remaining community bathhouse by wooden structure, and it sits at the center of the town in a compact building that has been rebuilt and renovated over the centuries but retains the general form and function of a neighborhood bath that has been used continuously since before anyone still living can remember. The name translates literally as Mackerel Lake Baths, which is a strange name for an inland spring. The characters for mackerel and lake were assigned to the name in a later era, replacing an older phonetic spelling, and the mackerel connection is largely ornamental at this point rather than historical.

The water at Sabakoyu is a simple alkaline spring, pH neutral and soft, running at about 42 to 44 degrees. It is clear and odorless, the kind of water that does not announce itself through chemistry but instead through comfort. The bath room is plain and warm, and the public nature of it means you enter as a stranger and sit a few feet from people who have been coming here their whole lives. Matsuo Basho stopped at Iizaka Onsen in 1689 during the journey he later wrote about in Oku no Hosomichi. He wrote that the village was somewhat rough and the bath house was basic. The bath house is no longer basic, but the village's lack of pretension is still intact.

The town's connection to history sits lightly on it. The inns along the main street number over forty, and on weekend evenings the izakayas fill up with people who drove from Fukushima City for the bath and the meal rather than the cultural significance. The tram back runs until late and the platform is small enough that you will recognize faces from the bathhouse waiting beside you. That easy scale, the kind where a town has not outgrown its own community, is the actual reason people keep returning.