As it stands… Japanese rifle line is badly implemented.
Their Tier 1 Bolt Action rifles are better than the stuff they get later and other rifles are just plainly overtiered, yes you Type Otsu at Tier 4. Then there is horribly missed opportunities such as Type Hei Late as the main tree researchable weapon.
What I think shuld be the Tier and stats. If i dont mention certain stats, i intend to not keep them the same.
Tier 1
Type 38 Carbine
Rate of Fire: 54 → 55
Damage: 20.5 → 19.5
Reload Time: 3.0 → 2.5 sec
Type 38 Rifle
Rate of Fire: 63 → 55
Damage: 21.0 → 20.5
Reload Time: 3.5 → 3.0 sec
Type 1 Rifle
Rate of Fire: 48 → 60
Damage: 23.1 → 20.5
Reload Time: 3.0 → 3.5 sec
::::::::
Tier 2
Type 44 Carbine ---------------- [Premium]
Damage: 19.5
Rate of Fire: 60RPM
Reload Time: 2.4 sec
Vertical Recoil: 45
Horizontal Recoil: 30
Type 99 Rifle (Late)
Rate of Fire: 42 —> 50
Damage: 23.4 → 23.5
Reload Time: 3.2 → 3.5 sec
Type 99 Rifle (Early)
Rate of Fire: 48 —> 55
Damage: 22.6 —> 23.5
Reload Time: 3.1 —> 3.0 sec
Type 38 Rifle with Launcher
Rate of Fire: 63 → 55
Damage: 21.0 → 20.5
Reload Time: 3.5 —> 3.0 sec
:::::
Tier 3
Type 99 Rifle with Launcher
Rate of Fire: 48 → 55
Damage: 22.6 → 23.5
Reload Time: 3.1 —> 3.0 sec
Type Otsu Rifle ------------------------- [Premium]
Reload Time: 2.3 sec → 2.6 sec
Damage: 11.2 → 12.0
Type Hei / early (5 Mag)
Reload Time: 3.2 → 3.0 sec
Damage: 11.6 → 12.0
:::::
Tier 4
Type Ko Rifle --------------------------- [Premium]
Rate of Fire: 260 —> 320RPM
Reload Time: 5.4 sec → 5.0 sec
Damage: 11.2 → 12.0
Type Hei / Late (10 Mag) [Main Tree]
Reload Time: 2.9 sec → 3.0 sec
Rate of Fire: 320 → 260
Damage: 13.9 → 12.0
Type 4 Rifle
Damage: 12.4 → 13.0
Reload Time: 5.2 sec —> 4.0 sec
:::::
Tier 5
Hino Komuro Rifle
Damage: 12.0
Rate of Fire: 300RPM
Reload Time: 3.5 sec
Magazine Size: 15 Rounds
Vertical Recoil: 38
Horizontal Recoil: 22
Shisei Rifle
Damage: 12.0
Rate of Fire: 750RPM
Magazine Size: 20 Rounds
Reload Time: 3.0 sec
Vertical Recoil: 50
Horizontal Recoil: 12
::::::
My Sister thread of this one for Japanese Tanks: