If you're going to Tokyo then no trip is complete without a visit to Kabukichō, an entertainment and red-light district in Shinjuku and one of the largest red-light districts in Japan. The area is located on the eastern side of Shinjuku train station and is totally safe for foreigners to explore. The district is full of hostess clubs, love hotels, nightclubs, and shops, and it's often known as the "Sleepless Town" for reasons we probably don't need to explain!