Shinjuku is Japan’s largest business, culture, and entertainment center. A wide range of commercial activities and social services are essentially underpinned by Shinjuku Station — the nation’s busiest transit hub with around 3.5 million daily passengers. In addition to urban and regional train services, many intercity bus lines in Shinjuku connect more than 300 cities and towns in 39 prefectures nationwide. Recently, the national government initiated the development of an integrated multimodal transportation complex combined together with the improvement of a pedestrian circulation system in collaboration with the private sector.  The entire project consists of three major capital improvements of the south exit of the Shinjuku Station area: building Shinjuku Expressway Bus Terminal (Busta Shinjuku), widening sidewalks, and constructing an underground passage.