BR I
Type 95 Ha-Go
Type 98 Ke-Ni Prototype (the version in game)
Type 98 Ke-Ni Production
Type 1 Ka-Mi
Type 3 Ke-Ri
Type 2 Ke-To
Type 4 Ke-Nu
Type 89 I-Go Ko
Type 89 I-Go Otsu
Type 97 Chi-Ha
Type 97 Chi-Ha Kai
BR II
Type 5 Ke-Ho
Type 1 Chi-He
Type 2 Ho-I (75mm)
Type 2 Ho-I (57mm)
Type 5 Ke-Ho II
Type 1 Ho-Ni I
Type 2 Ho-Ni II
Type 3 Ho-Ni III
Chi-Ha 12cm Short
Type 4 Chi-To I
BR III
Type 4 Ho-Ro
Type 3 Chi-Nu
Type 5 Na-To
Type 3 Chi-Nu II
Type 3 Chi-Nu Kai
BR IV
Type 4 Chi-To II
Type 4 Chi-To Production
Type 5 Chi-Ri II
Type 5 Chi-Ri Production
Type 5 Ka-To
BR V
O-I
Type 5 Ho-Ri II (the real production version)
Type 5 Ho-Ri III (the fake version in game)
Chi Ha 12cm Short and Ho Ni 2, probably are both BR3, though I do think the Na-To could go down purely because how easy it is to kill, like a single HE shell near it is instant death for it.
No, the Ho-Ri tank was not fully built. While the Japanese Army had plans to produce 5 units, only one fully operational prototype was completed, and the remaining four were only 50% complete by the end of the Second World War. The War Thunder wiki states that the project was scrapped and no further testing was pursued. The “Ho-Ri Production” variant, which is also a subject of discussion, was also not built in reality, according to a Reddit thread and a YouTube video.
This version was a mockup and is considered the most accurate representation of the intended design. It was a tank destroyer with a forward-mounted engine and a 105mm gun.