The level of street-network sprawl in new development in Kumamoto followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Kumamoto, we can consider two of its most populous cities: Kumamoto and Yatsushiro. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Kumamoto peaked in 1976-1990. The level of street-network sprawl in new development in Yatsushiro peaked in 1976-1990.

How do development practices in Kumamoto fare in comparison to others in Japan? Most recently in 2006-2020, street construction in Kumamoto was the 18th-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, street construction in Kumamoto has become more disconnected. Kumamoto ranked 20th in 1975, 17th in 1976-1990, 17th in 1991-2005 and 18th in 2006-2020.

As of 2020, the city with the most disconnected street network in Kumamoto is Kumamoto with an SNDi of 2.38, which is well-connected. Conversely, the most connected city is Yatsushiro with an SNDi of 2.07, which is well-connected. See trends for these cities: Yatsushiro, Kumamoto

The level of street-network sprawl in the aggregate network in Kumamoto rose steadily. To get a sense of how the aggregate street network has changed in Kumamoto, we can consider two of its most populous cities: Kumamoto and Yatsushiro. Out of the two cities, Yatsushiro does not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Yatsushiro peaked in 1976-1990.

To date, Kumamoto is the 21st-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has fallen; relative to other regions in Japan, the street network in Kumamoto has become more connected. Kumamoto ranked 20th in 1975, 21st in 1976-1990, 20th in 1991-2005 and 21st in 2006-2020.