Capsule hotels are said to have originated in Osaka. They are characterized by capsule-shaped beds, as shown in the image, arranged in rows along a room. They have been around for 40 years, and have evolved into one of the most popular lodging options, with women-only floors, saunas, and lounge areas for working or studying. The stay rates are also inexpensive, making them a popular choice for travelers who want to stay alone and travel light. However, each capsule is a bed only and does not have a lock. If there is a locker with a key for personal use, you should store your valuables there.