The 23-year-old has penned a three-year contract at Ikamva.
Takwara helped FC Platinum win their maiden topflight title in his homeland in 2017, while he was also part of the Warriors' COSAFA Cup triumph in Rustenburg last year.
“It is a great feeling, I am really happy to have finally joined the Urban Warriors,” Takwara told his club's website.
“I’d describe myself as a tough-tackling midfielder. I’m massive [laughs], I can pass the ball around, but I’d say my best attribute is breaking down opposition attacks.”
Ajax head of football Mich D’Avray backs Takwara to shine as a number six in the Mother City.
“We first spotted Gerald at the COSAFA Cup Tournament in Rustenburg. We brought him here in pre-season and looked to sign him then, but he was still contracted to his club and they wanted him to stay put as they were pushing for the league title in Zimbabwe.
“But, we finally got our man and we look forward to what we will bring to the club.
“He [Takwara] is a nuggety midfielder, quite aggressive, very strong. Hopefully he can adjust and settle in quickly.
“He has a bit of bite in him, he gets stuck in and keeps it simple.”
The Urban Warriors also recently recruited Takwara's compatriot Tendai Ndoro, who previously worked with new coach Muhsin Ertugral at Orlando Pirates and Mpumalanga Black Aces.