Introducing "Keiichi no Mizu," the world's first Hydrate Ion water made using a special machine that has obtained an international patent, and potassium carbonate. Also, "Waka-ga-EL," a bath additive that contains a rich amount of minerals, allowing you to enjoy an onsen (hot spring) experience in your own home. These items arrived last month (September 2025) and are brand new and unopened. Purchase price: 8200 yen Would anyone like to try them? ☺︎ Please understand that these items are stored at home.