Hachi Isn't An Actual Tank Name.
Product: Battlefield V
Hi, As A Japanese Tank Enthousiast I'm Kind Of Dissapointed Of The Naming Of The Chi-Ha With Rockets. Ofcourse It's Just A Game And Not Everything Has To Be 100% Historical. But Aside This Squad Reinforcement, All Tanks & Vehicles Are Potrayed As Accurate As They Can Be (Only The Chi-Ha With 37mm Hull Mounted + A Working Turret Didn't, But That's An Other Topic).
As Accurate As The Rocket Pods Are On The "Hachi" They're Modeled Correctly After The Chi-Ha GS, A Special Engineering Vehicle That Has Bangalore Launchers Attached On Top Of The Engine, And Not On The Turret: 
It'd Be Amazing If The "Hachi" Got Renamed To A More Accurate Name (Chi-Ha GS). And Even Greater If The Bangalore Launchers Were Put On The Back, But From A Gameplay Perspective I Fully Respect It Being On The Turret.
Additional Information About The Turret, This Is A Chi-Ha Kai Turret With The Gun Being The Bangalore Launcher. The Rocket Pods Are Still In Fact Rockets, But The "Cannon" Is Actually A Land Torpedo Launcher.