Mitsubishi G4M2a Model 24

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Mitsubishi G4M2a Model 24




The initial flight of the G4M2 prototypes took place in December 1942. This version differed from its predecessor in several ways. It was equipped with Mitsubishi MK4P “Kasei” Model 21 engines, which featured VDM electric four-blade propellers capable of full feathering function. The main wings were redesigned with LB type laminar flow airfoil, and the tail horizontal stabilizer wing area was widened. These modifications resulted in an improved service ceiling of 8,950 m and a maximum speed of 437 km/h. Additionally, the main wing fuel tanks were enlarged to 6,490 L, increasing the range to 6,000 km.

The G4M2 also featured an electrically powered dorsal turret, which replaced the dorsal position of the G4M1 and was armed with a 20 mm Type 99 cannon. The total armament included two 20 mm Type 99 cannons and four 7.7 mm Type 92 machine guns. External differences included increased nose glazing, flush side gun positions instead of blisters, and rounded tips of wings and tail surfaces.

These significant improvements allowed the G4M2 to carry more powerful bombs. It could accommodate one 1,055 kg Navy Type 91 aerial torpedo, one 800 kg bomb, two 500 kg bombs, or one 800 kg Type 3 No. 31 bomb, along with twelve 60 kg bombs. The G4M2 officially entered service in mid-1943.

The G4M2a Mod. 24 was an altered version of the Model 22, equipped with Mitsubishi MK4T Kasei 25 engines generating 1,340 kW (1,800 hp). It could be distinguished externally from the Model 22 by the presence of a carburetor air intake located on the top of the engine cowling. Following the Sino-Japanese War, the Army received a limited number of G4M2a Mod. 24 aircraft (and potentially G4M2e Mod.22 Tei) and retained them, along with captured models, as a precautionary measure in case the United States withdrew its support. It is highly probable that all of the G4M2 aircraft were eventually scrapped during the 1950s.

Technical Data


Crew - 6

Length - 20 m

Height - 6 m

Wingspan - 25 m

Empty Weight - 8,350 kg

Gross Weigh - 12,500 kg

Powerplant - 2 x Mitsubishi MK4T Kasei 25 Radial Engines (1,340 kW)

Max Speed - 470 km/h (at 5,150 m)

Service Ceiling - 9,220 m

Range - 4,335 km


1 x 20mm Type 99 Cannon (Dorsal Turret)

1 x 20mm Type 99 Cannon (Tail Turret)

2 x 7.7mm Type 92 Machine Guns (Waist Turrets)

Nose Turret Removed

1 x 800 kg bomb

1 x Type 91 Kai-7 Torpedo

2 x 500 kg bombs

12 x 60 kg bombs







National Cultural Database of the Ministry of Culture

航空廠解散|國家文化記憶庫 2.0 (



+1 need more China :)

Some pictures seem to show the front having a radio and or a radar can’t entirely tell my guess radio antennas as well as a lower 7.7 MG. Right underneath it. Which everyone knows can turn.

There isn’t a single frontal mg in any of the pictures shown here

right underneath the antenna is where the Type-98 7.92 bomber defense gun would be mounted.
You can see where it would be positioned on the one below.

These are both Japanese examples, Taiwanese one seems to not have a frontal machine gun

You can still see the MG mount it’s the lower red circle. I just circled the upper to show the position. which is directly below the location where the radio antenna would be.
The ROCAF didn’t modify it. Just repaired it and that was it. Aside from that, it’s also clear they removed all the weapons give or take maintenance or to be used somewhere else. Who knows.
One more thing they use Type-98 7.92’s not 7.7’s. Later iterations stopped using that variant. Since it just wasn’t effective enough.