"The Post". www.thepost.co.nz. Retrieved 20 April 2025.
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Kikuchi, Masayuki[in Japanese] (9 June 2018). テロへの備え、警察の「特型警備車」誕生の背景 [Preparing for Terrorist attacks - Background of the birth of the Special Armored Vehicles]. TrafficNews.jp (in Japanese).
Kikuchi, Masayuki[in Japanese] (9 June 2018). テロへの備え、警察の「特型警備車」誕生の背景 [Preparing for Terrorist attacks - Background of the birth of the Special Armored Vehicles]. TrafficNews.jp (in Japanese).