Information Revolution

In the Sengoku period, daimyo had to improve roads or lay out new ones as a way of pacifying lands under their control. Road also assisted in increasing economic activity and furthering local self-sufficiency. Urbanisation also surged, with retainers and skilled craftsmen moving into the many growing regional cities, which became infrastructural hubs. Bridges were thrown across rivers and valleys, and post-horse systems set up; waterways were cleared and ferry services installed.
Improving roads was a matter is vital concern. The old mediaeval network was no longer adequate to allow movement of soldiers and to link castles with their branch fortresses.
Water transport dominated in the West, while East Japan lacked navigable rivers. Most post-horse services were only domain-wide, although one of the best was that of the Hojo, who built large stations with wholesale outlets; their roads were free of charge to officials, and cost one sen per ri for private travellers.