This is 20L of Tamagawa Onsen's strongly acidic hot spring water. Purchased in December 2021, it has been kept unopened since it arrived, as shown in the photos. I'm not sure if it's still usable, but since it's strongly acidic hot spring water, I'm hoping it's still good despite the time that has passed, so I'm listing it. No claims and no returns accepted. Because it is strongly acidic water, adding it directly to the bath is said to damage the bathtub and drain pipes. Please dilute it and use it for foot baths, etc.