Gv. 25 (Type 25)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 120mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 31 (Type 31)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 120mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 19 (Type 19)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 120mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Gv. 13 (Type 13)

A Japanese heavy tank prototype developed during World War II, designed to be a more powerful and heavily armored heavy tank. It featured a 120mm gun and thick armor, but was never mass-produced due to wartime production constraints.

Fy-175 (United States): M103 Heavy Tank

The M103 Heavy Tank was a post-war American heavy tank designed to counter Soviet heavy tanks like the IS-3. It was equipped with a powerful 120mm gun and was known for its thick armor and good mobility. The M103 was a formidable opponent but was complex and expensive to maintain.