Onsen water typeswhat makes water an onsen in Japanese law, the ten spring types, and how to read the sign by the bathRead Soak
Onsen within walking distance of a station, with the tattoo policy, towel rules and English signage stated up front.
Before you goWhat the water is, and what the words mean
Onsen water typeswhat makes water an onsen in Japanese law, the ten spring types, and how to read the sign by the bathRead Hokkaido1 onsen town
OverviewHokkaido hot springs: the most onsen areas in Japan, the volcanoes behind some of them, and what the count does not tell youRead
TōhokuOverview only, for now
OverviewHonshu hot springs: five regions, a volcanic front, and hot water where there is no volcano at allReadKantō2 onsen towns
OverviewHonshu hot springs: five regions, a volcanic front, and hot water where there is no volcano at allRead
Chūbu, Hokuriku and Tōkai1 onsen town
OverviewHonshu hot springs: five regions, a volcanic front, and hot water where there is no volcano at allRead
Kansai2 onsen towns
OverviewHonshu hot springs: five regions, a volcanic front, and hot water where there is no volcano at allRead
Chūgoku1 onsen town
OverviewHonshu hot springs: five regions, a volcanic front, and hot water where there is no volcano at allRead
Shikoku1 onsen town
Kyushu3 onsen towns
OverviewKyushu hot springs: over a third of Japan’s springs, the volcanoes some towns name, and how Beppu puts its water to workRead
Beppu Onseneight bath towns, hells you look at, and a hundred neighbourhood bathsRead the guide 
Kurokawa Onsenthirty inns, one entry pass, and an open-air bath tour that remade a valley townRead the guide 
Yufuin Onsena basin of springs, a town that chose not to become a resort, and its quieter neighboursRead the guide