4 December 1952 - Designated as First Class National Highway 25 (from
Osaka to
Nara)
18 May 1953 - Designation of Second Class National Highway 163 (from
Osaka to
Yokkaichi)
1 April 1963 - Designated as First Class National Highway 25 (from
Yokkaichi to
Osaka)
1 April 1965 - Second Class National Highway 163 was redesignated as General National Highway 25 between
Yokkaichi and
Osaka
Intersects with
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^"一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.
^一般国道25号 (in Japanese). Kinki Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 27 November 2010.