24 hrs. in Marunouchi Part 2

24 hours in Marunouchi. This is the nerve center of the Japanese economy. The headquarters of big companies and financial institutions cluster here. Businesspeople from around the world fill its office buildings. It also boasts important historical locations like Tokyo Station and the Imperial Palace. These days, startup companies are flooding into Marunouchi. On part 2 of our Marunouchi special, we'll see how this part of town never sleeps.