The level of street-network sprawl in new development in Naoasaki followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Naoasaki, we can consider three of its most populous cities: Nagasaki, Sasebo and Isahaya. Out of the three cities, Nagasaki does not follow the same trend as the region. The level of street-network sprawl in new development in Nagasaki peaked in 1976-1990.

As of 2020, the city with the most disconnected street network in Naoasaki is Sasebo with an SNDi of 3.63, which is relatively sprawly. Conversely, the most connected city is Omura with an SNDi of 2.48, which is relatively well-connected. See trends for these cities: Omura, Sasebo

The level of street-network sprawl in the aggregate network in Naoasaki rose steadily. To get a sense of how the aggregate street network has changed in Naoasaki, we can consider three of its most populous cities: Nagasaki, Sasebo and Isahaya. Disconnectivity in the most populous cities in Naoasaki follow the same region trend.