Japanese Explosive Motorboats

Vessel	Dimensions	Displacement	Machinery	Speed	Armament	Crew
Type 1 Shinyo	19.7' x 5.4' x 1'	1.35-tons	67 b.h.p. internal combustion engine	max speed 26 knots	551-661lb (250-300kg) explosive charge; 2 x 4.7in (119mm) RAK-12 rocket guns.	1
Type 5 Shinyo	21' x 5.8' x 2.9'	2.2 -tons	2 x 67 b.h.p. internal combustion engines	max speed 30 knots	551-661lb (250-300kg) explosive charge; 2 x 4.7in (119mm) RAK-12 rocket guns, 1 x 13.2mm Type 93 HMG	2

IJN Shinyo Types 1 and 5 Explosive Motorboats

(Type 1 Shinyo captured at Motobu Peninsula, Okinawa)

Vessel Dimensions Displacement Machinery Speed Armament Crew
Type 1 Shinyo 19.7' x 5.4' x 1' 1.35-tons 67 b.h.p. internal combustion engine max speed 26 knots 551-661lb (250-300kg) explosive charge; 2 x 4.7in (119mm) RAK-12 rocket guns. 1
Type 5 Shinyo 21' x 5.8' x 2.9' 2.2 -tons 2 x 67 b.h.p. internal combustion engines max speed 30 knots 551-661lb (250-300kg) explosive charge; 2 x 4.7in (119mm) RAK-12 rocket
guns, 1 x 13.2mm Type 93 HMG 2

Authors’ Notes:
[1] The semi-circular bow hatch housed the Shinyo's 250-kg explosive charge.
[2] The IJA's EMBs known as "Maru-ni" or their cover name "Renraku-tei" (liaison boats), or "Q-boats"by the Allies, were of generally similar size and configuration. Maru-ni carried two 120-kilogram depth charges, one on each side of the cockpit.