96 150 mm infantry mortar with recoil absorber removed to save weight) Heavy mortars & rocket launchers Type 98 320 mm mortar Type 4 20 cm rocket launcher Type 3 300 mm heavy mortar on Type 4 Ha-To SP heavy mortar carrier Type 4 40 cm rocket launcher Type 5 mortar launcher "Tok" Type 10 and Type 3 rocket boosters Field artillery 7cm mountain gun (75 mm caliber, short bronze barrel) Type 31 75 mm mountain gun (steel version) 7 cm field gun (75mm caliber, long bronze barrel) Type 31 75 mm field gun (steel version) Type 41 75 mm mountain gun (license-built Krupp M.08 mountain gun) Type 94 75 mm mountain gun (indigenous design to replace Type 41 75 mm mountain gun) Type 38 75 mm field gun (license-built Krupp gun) Type 41 75 mm cavalry gun (lengthened Type 38 75 mm field gun) Type 90 75 mm field gun (indigenous design to replace Type 38 75 mm field gun) Type 95 75 mm field gun (supersede Type 90 75 mm field gun to reduce costs) Type 99 10 cm mountain gun Krupp 10.5 cm cannon Type 38 10 cm cannon (license-built Krupp 105mm howitzer M1905) Type 91 10 cm howitzer (indigenous light-weight howitzer to supplement Type 38 15 cm howitzer) Type 14 10 cm cannon (indigenous design, largely unsuccessful) Type 92 10 cm cannon (replacement for Type 14 10 cm cannon) 120 mm Krupp howitzer M1905 Type 38 12 cm howitzer (license-built 120 mm Krupp howitzer M1905) Type 38 15 cm howitzer (license-built 150 mm Krupp QF howitzer M1905) Type 4 15 cm howitzer (changes of Type 38 15 cm howitzer to improve portability) Type 96 15 cm howitzer (intended replacement of Type 4 15 cm howitzer) Fortress and siege guns Type 7 10 cm cannon (early production of Type 14 10 cm cannon) Type 45 15 cm coast defense gun (1912) – barbette-mounted coastal defense gun Type 7 15 cm cannon Type 89 15 cm cannon -main heavy gun of Imperial Japanese Army Type 96 15 cm cannon 28 cm howitzer L/10 Type 45 24 cm howitzer (1912) – replacement for 28 cm howitzer L/10 Type 96 24 cm howitzer Type 90 24 cm railway gun – Built in France Type 7 30 cm howitzer (1918) – semi-mobile siege gun Experimental 41 cm howitzer Infantry guns Type 11 37 mm infantry gun Type 92 70 mm infantry