| Manufacturer |
Project Designation
(Ki Go, Ryaku Go) |
Official Designation
(Seishiki Meisho) |
Notes |
| ? |
Ho-? |
Army Type 88 |
12.7 mm |
| ? |
Ho-? |
Army Type 88 |
75 mm |
| ? |
Ho-? |
Army Type 94 |
37 mm |
| Japan Special Steel, Giken, Kokura Army Arsenal |
Ho-1 |
Army Type 97 20 mm Cannon |
Based on Army Type 97 20 mm Anti-tank Gun |
| -- |
Ho-2 |
-- |
Experimental fixed machine cannon, possibly based on Type 97 |
| Japan Special Steel, Giken, Kokura Army Arsenal |
Ho-3 |
Army Type 97 20 mm Cannon |
Based on Army Type 97 20 mm Anti-tank Gun |
| Kawamura |
Ho-4 |
-- |
Experimental improved version of Ho-1, Ho-3; cancelled in favor of Ho-5 |
| Chuuou Kougyou KK, Hitachi Heiki; Kokura & Nagoya Army Arsenals |
Ho-5 |
Army Type 2 20 mm Lightweight Machine Cannon |
Scaled-up Ho-103 |
| -- |
Ho-5-2 |
-- |
Experimental flexible version of Ho-5 |
| -- |
Ho-5-II |
-- |
Experimental lightened version of Ho-5 |
| -- |
Ho-6 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-7 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-8 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-9 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-10 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-11 |
-- |
Experimental 20 mm machine cannon |
| -- |
Ho-12 |
-- |
Experimental machine cannon based on Browning machine gun with 20 x 125 cartridge |
| -- |
Ho-51 |
-- |
Experimental machine cannon based on Browning machine gun with 25 x 115 cartridge; developed into Ho-155 |
| -- |
Ho-52 |
-- |
Experimental machine cannon based on Browning machine gun with 25 x 150 cartridge |
| -- |
Ho-101 |
-- |
Experimental gas-operated fixed machine cannon, 12.7 x 81 SR; possibly Scotti / Isotta-Mareschi |
| -- |
Ho-102 |
-- |
Experimental Breda-SAFAT machine cannon, 12.7 x 81 SR |
| Chuuou Kougyou KK; Kokura & Nagoya Army Arsenals |
Ho-103 |
Army Type 1 13 mm Fixed Machine Cannon |
Based on Browning Model 1921 firing Italian 12.7 x 81 SR cartridge |
| Chuuou Kougyou KK |
Ho-104 |
Army Type 1 13 mm Flexible Machine Cannon |
Dedicated flexible version of Ho-103 |
| Chuuou Kougyou KK, Nagoya Army Arsenal |
Ho-155-I |
-- |
Scaled-up 30 mm version of experimental Ho-51 |
| Chuuou Kougyou KK, Nagoya Army Arsenal |
Ho-155-II |
-- |
Smaller version of Ho-155-I; 30 mm |
| -- |
Ho-201 |
-- |
Experimental 37 mm flexible machine cannon |
| -- |
Ho-202 |
-- |
Experimental 37 mm fixed machine cannon, possibly based on Ho-201 |
| Japan Special Steel; Kokura & Nagoya Army Arsenals |
Ho-203 |
Army Type 3 37 mm Machine Cannon? |
Based on Army Year 11 Type Direct-Fire Infantry Gun |
| Chuuou Kougyou KK; Kokura & Nagoya Army Arsenals |
Ho-204 |
Army Type 4 37 mm Machine Cannon? |
Based on Browning M2 |
| -- |
Ho-205 |
-- |
Experimental, smaller version of Ho-204 |
| Kokura Army Arsenal |
Ho-251 |
-- |
Experimental 47 mm machine cannon project |
| Chuuou Kougyou KK, Nagoya Army Arsenal |
Ho-301 |
-- |
Scaled-down 40 mm version of Army Type 89 Heavy Grenade Launcher |
| Japan Special Steel, Nagoya Army Arsenal |
Ho-401 |
-- |
Scaled-up 57 mm version of Ho-203, based on Type 90 Tank Gun |
| -- |
Ho-402 |
-- |
Experimental 57 x 477 R tank/anti-tank gun, intended for Ki-93-Ia |
| Kokura Army Arsenal |
Ho-403 |
-- |
Experimental 57 x 187 R project |
| -- |
Ho-501 |
-- |
Experimental 75 mm version of Ho-203 |
| -- |
Ho-505 |
-- |
No information, possible development of Type 88 anti-aircraft gun |
| -- |
Ho-601 |
-- |
Experimental 120 mm machine cannon design |
| -- |
Ho-3057 |
-- |
Experimental gun chambered for 57 x 265 caseless cartridge, based on Browning machine gun |
| -- |
Ho-3075 |
-- |
Experimental 75 mm version of Ho-3057 |
| -- |
Ho-3157 |
-- |
Experimental 57 x 187 RB, Hotchkiss/Nambu design |
| -- |
Ho-3175 |
-- |
Experimental 75 mm version of Ho-3157 |
