I go to Kaisei-yu alot too. At Kaisei-yu they have a Kuroyu bath, a Silk bath, a Jacuzzi Bath, a Carbonated Bath, and a cold bath, too. All of this for 460 Yen! What a deal, right? The Hydrogen Carbonate bath is really rare, so you have to check it out.

What is that water tank in the back, you say? Those are the fish that used to live in the pond where this building was built. I wonder how many generations have passed since this place was built?

Speaking of which, lots of onsen are forced to close because they don’t have anyone to take them over. The local factories have a similar problem, so it hits close to home.

But Kaiseiyu is actually run by a young whipper snapper, full of spunk. His name is Maikawa and he has been to over 1,000 onsen around the country. He has come to be known as the “bath producer” and has even been featured on television.

The female worker is named Nakano. She is a student who graduated from an engineering university in Kamata, where she studied design. She said she makes paintings using the dried up Kuroyu bath water as well. Did you notice the “Kuroyu” beer in the waiting room? She also designed that package. I could never do something like that.

Now that I think of it, the owner did say something about “Kuroyu coming from industrial water.” After the war, the factories needed irrigation water, and when they went digging they found black water. They found that if they boiled the water, it had the same effect as an onsen, which is how the Kuroyu onsen started. So this onsen hasn’t actually been around for that long. Well, that’s all stuff from my pop’s generation, so I don’t know that much about it, but it’s interesting that Kuroyu was originally used as irrigation water.

The owner once said, “I would love for Kamata to become known as an Onsen Town.” Each kuroyu has a different quality of water. Lots of people travel to Kusatsu and Yofuin to check out the onsens right? He wants Kamata to be like that, too. You don’t have to have a super potent Kuroyu bath. Even if it’s less potent, it still has a strong effect on the body. Each Onsen in Kamata is different, so you should try to check them out.

The master also said “Towns with Onsen are more lively.” That’s right. There are plenty of interesting shops in Kamata so you should check those out too in between visiting the Onsen. If you do that and become a fan of this area, then I’d be real happy.

Hours of Operation: 15:00-24:30
Holidays: Friday
Phone: 03-3731-7078
Address; 5-10-5 Kaisei Building 1F, Nishi Kamata, Ota-ku, Tokyo-to