Gv. 21 (Type 21)

A Japanese medium tank prototype developed during World War II, designed to be a more powerful and heavily armored medium tank. It featured a 75mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 5 (Type 5)

A Japanese light tank prototype developed during World War II, designed to be a more modern and powerful replacement for the Type 97 Chi-Ha. It featured a 57mm gun and sloped armor but was never mass-produced due to wartime production difficulties.

Gv. 22 (Type 22)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 105mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 6 (Type 6)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 37mm gun and lighter armor, but was never mass-produced due to wartime production constraints.

Gv. 23 (Type 23)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 37mm gun and lighter armor, but was never mass-produced due to wartime production constraints.

Gv. 7 (Type 7)

A Japanese medium tank prototype developed during World War II, designed to be a more powerful and heavily armored medium tank. It featured a 75mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 9 (Type 9)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 47mm gun and lighter armor, but was never mass-produced due to wartime production constraints.

Gv. 10 (Type 10)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 105mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 11 (Type 11)

A Japanese light tank prototype developed during World War II, designed to be a more agile and versatile light tank. It featured a 37mm gun and lighter armor, but was never mass-produced due to wartime production constraints.

Gv. 12 (Type 12)

A Japanese medium tank prototype developed during World War II, designed to be a more powerful and heavily armored medium tank. It featured a 75mm gun and thick armor, but was never mass-produced due to wartime production constraints.