It remains the only Japanese national highway to be given a two-digit number following the reclassification of the Primary and Secondary National Highways as the General National Highways in 1965. Until 30 July 1978, traffic on National Route 58 in Okinawa Prefecture drove on the right rather than the left. After the 730 switch, Okinawa joined the rest of Japan in driving on the left in accordance to the Vienna Convention on Road Traffic.
It is still the only Japanese national highway with a two-digit number following the reclassification of Primary and Secondary National Highways into General National Highways in 1965. Until July 30, 1978, traffic on National Route 58 in Okinawa Prefecture drove on the right side rather than the left. After the 730 switch, Okinawa aligned with the rest of Japan by driving on the left according to international road traffic conventions.