What you saw is called capsule hotel . It is an accomodation where many business people, who missed the last train to go home, stay for the night. Japanese has 46 characters called Katakana , which people use to write foreign words. Each Katakana has a sound, and they can phonetically represent words. Sumo is probably more popular than baseball these days.
Tickets are very difficult to obtain.
Go to the Catalog on the Web. Go back to Asahi Japan Collectibles Home Page.