I didn’t expect much from a capsule hotel, but it was much better than I thought! The air conditioning was perfectly cool, and each capsule had its own mirror. When you pull down the curtain, it gets completely dark — I couldn’t even tell it was morning when I woke up.
Breakfast was great — they had boiled eggs, omelets you can cook yourself, toast with kaya, and what looked like yakisoba (though I didn’t try it). There were also cereals, milk, tea, coffee, and free drinking water refills.
Overall, it was a really good stay. They provided towels, soap, shampoo, a hairdryer, toothbrushes, and toothpaste. The location is also convenient, close to several train lines.