Naha in context: Street-network sprawl trends

Naha in context

2.22.42.62.8<19751976–19901991–20052006–2020SNDi of street additions
2.22.42.62.8<19751976–19901991–20052006–2020SNDi of entire street network
NahaOkinawa (Region)Japan (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Naha plotted against Okinawa and Japan. The SNDi of new construction in Naha peaked in 1991-2005, compared to Okinawa which peaked in 1991-2005 and Japan which followed a zig-zag trend with an overall increase. Most recently, Naha's incremental SNDi fell from 2.76 to 2.58 between 1991-2005 and 2006-2020. In terms of the aggregate network, Naha ranked 1st out of 1 cities in Okinawa and 81st out of 135 in Japan as of 2020.

New Street Additions (2006–2020)

SNDi value
2.58
Rank in Japan
63rd of 135
Rank in Okinawa
1st of 1

Entire Network (Aggregate)

SNDi value
2.47
Rank in Japan
81st of 135
Rank in Okinawa
1st of 1

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
NahaFushanBerhampore

While Fushan and Berhampore both fluctuated in its street-construction patterns, Naha built increasingly disconnected streets from 1975 through 1991-2005, then improved in new street additions. For the full street network, though, all three cities follow the same trend. Naha and Fushan have been growing further apart in their street-network character since 1975.