This topic is for AB (Arcade tank mode).
Anyway, throughout my grind of the Japanese tank tree, discounting oddities like howitzers, low tier tanks, and post war tanks (STB-1 is definitely competitive), the only Japanese tank that plays like a conventional tier 4 heavy, is the Ho-Ri Production.
In fact, the Ho-Ri is among the best; before the new penetration formula (back in 2016 I think) it was unstoppable and immune to long 88 on the upper structure. Nowadays it’s not as immune, but still, with the fast reloading gun with good damage it can quickly wreck enemies (I got the close quarter battle pass task that way)
Unlike other similar “heavy” vehicles like KTH, the Ho-Ri is very fast for its tier, similarly with “fast and heavy” like the IS-7.
The other Japanese tanks, I wouldn’t call them “good”. Some are okay, average or competitive but doesn’t really stand out.
With the new 5s reload change for most MBTs, the advantage of the Type 90/10 becomes less and less. The tier 4 Japanese tanks sacrifice armor for slightly better acceleration (which is neglected by low top speed), and unlike the TAM, they do not have good survivality.
I am not sure of these of tier 6+, as I only have STB-1 and Type 90 (way back in time, I got to the top because these were among the few vehicles available)