There is a mysterious giant gap between Ho-Ni 1 and Chi Ha short gun in the Japan tech tree.
It seems like dev stretch the tech tree to put Chi Ha short gun and Chi Nu at end of tier 3 and beginning of tier 4. This is not the way to give Japan high tier stuff by putting those tank on tier they don’t belongs to.
Lets look at tier 3 of other nations.
Sherman 2 and M4a2 have better armor but weaker gun compare to Chi Nu, so they are suitable counterpart for chi nu, but they are only on tier 3.
Germany has panzer4 F2 on tier 3, it has similar armor but better gun than Chi Nu.
Soviet has T-34 on tier 3. Which has better armor but weaker gun compare to Chi Nu.
The tier might not have much to do with the match making, but it is related to the research cost. I don’t think it is good to make Chi Nu cost more to research than its counter part.
In conclusion, Chi Nu should be at tier 3 not tier4.
So I propose to add Chi Nu II as the tier 4 tank of Japan.
It has a long 75 mm gun which is comparable to German long 75, US 76 and Ussr 85.
But it has the same armor as Chi Nu.
This is the tech tree change I proposed. Chi Ha short gun and Chi Nu move to tier 3 and add Chi Nu II on tier 4.