The level of street-network sprawl in new development in Shimane followed a zig-zag trend with an overall increase. To get a sense of how street development has changed in Shimane, we can consider two of its most populous cities: Matsue and Izumo. Disconnectivity in the most populous cities in Shimane follow the same region trend.

How do development practices in Shimane fare in comparison to others in Japan? Most recently in 2006-2020, street construction in Shimane was the 25th-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 Shimane has become more disconnected. Shimane ranked 36th in 1975, 28th in 1976-1990, 22nd in 1991-2005 and 25th in 2006-2020.

As of 2020, the city with the most disconnected street network in Shimane is Matsue with an SNDi of 2.66, which is relatively well-connected. Conversely, the most connected city is Izumo with an SNDi of 2.02, which is well-connected. See trends for these cities: Izumo, Matsue

The level of street-network sprawl in the aggregate network in Shimane followed a zig-zag trend with an overall increase. To get a sense of how the aggregate street network has changed in Shimane, we can consider two of its most populous cities: Matsue and Izumo. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Matsue rose steadily. The level of street-network sprawl in the aggregate network in Izumo rose steadily.

To date, Shimane is the 31st-most disconnected out of the 44 regions in Japan. Its position in the ranks since 1975 has risen; relative to other regions in Japan, the street network in Shimane has become more disconnected. Shimane ranked 36th in 1975, 36th in 1976-1990, 31st in 1991-2005 and 31st in 2006-2020.