The busiest railway junction and station complex in the world is Shinjuku Station in Tokyo, Japan. According to Guinness World Records, it handles an average of over 3.5 million passengers every single day. The station serves as a massive hub connecting more than 12 different railway and subway lines, including the JR East, Odakyu, Keio, and Tokyo Metro systems. With over 200 exits and 36 platforms, the station is so complex it is often described as a "city within a city." If you are referring to a road junction, the Shibuya Crossing, also in Tokyo, is frequently cited as the busiest pedestrian intersection, where as many as 3,000 people cross from all directions simultaneously during a single light cycle. Both locations represent the extreme scale of Japanese urban infrastructure and public transit culture.