The Imperial Japanese Navy deployed the 12 Senchi 28 Rensō Funshinhō (十二糎二八連装噴進砲, "12 cm, 28 tubes rocket launcher"), a specially built rocket launcher, on a number of aircraft carriers and battleships during 1944-1945, with the type first seeing action in October 1944.

This rocket launcher used the 25 mm triple AA mount with minor modifications.

[1] The rockets were intended to put up a barrage of flame, by being notably equipped on a 28 rack rocket-launcher, through which any aircraft attempting to attack would have to navigate.

An experimental 12cm 1.6 kg explosive warhead variant for use in the conventional artillery role was developed but is believed to have never entered formal service.

The Imperial Japanese Navy also attached a small number of 12cm AA rockets to suicide boats in 1945 to acts as a type of visual distraction against potential targets during an invasion scenario.