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General characteristics
4 peopleCrew
96 %Visibility
front / side / backArmour
40 / 40 / 25Hull
100 / 75 / 40Turret
38 tWeight
1431 hp750 hpEngine power
37.7 hp/t19.7 hp/tPower-to-weight ratio
59 km/h forward
23 km/h back
53 km/h forward
21 km/h back
105 mm L7A3 cannonMain weapon
50 roundsAmmunition
15 roundsFirst-order
8.3 / 10.8 sReload
-6° / 9°Vertical guidance
12.7 mm M2HB machine gunMachinegun
660 roundsAmmunition
8 / 10.4 sReload
200 roundsBelt capacity
577 shots/minFire rate
-10° / 40°Vertical guidance
4500 roundsAmmunition
8 / 10.4 sReload
250 roundsBelt capacity
500 shots/minFire rate
160000 Rp icon.pngResearch
390000 Sl icon.pngPurchase
Sl icon.png3560 / 5297/7980 / 11874/4250 / 6324Repair
110000 Sl icon.pngCrew training
390000 Sl icon.pngExperts
1300 Ge icon.pngAces
202 % Rp icon.pngReward for battle
160 % Sl icon.png150 % Sl icon.png130 % Sl icon.png


GarageImage STB-1.jpg

The STB-1 is a Rank V Japanese medium tank with a battle rating of 7.7 (AB/RB/SB). It was introduced along with the entire Japanese Ground Forces tree in Update 1.65 "Way of the Samurai". The prototype of the Type 74, the STB-1 presents many features that would be in the final design.

The STB-1 is the first researchable tank in Japan's Ground Forces Rank V. Despite having considerable more armour than its comparable counterparts the Leopard 1 and Leopard A1A1, as well as comparable mobility, it is not recommended as a front-line tank like the 'Allied' counterparts. Instead, a cautious hit-and-run tactic like the Leopards should always be employed. Using the tank's hydropneumatic suspension correctly can help with the tank's depression, and in some cases, aid in survivability. Do note that the L7 on this tank reloads significantly longer than other L7-equipped tanks.

The STB-1 is unique among being one of the only Japanese tanks that can take a hit, like the Type 4 Chi-To Late and Type 5 Ho-Ri Production. It has thick frontal hull armour that can bounce shots effectively, but should not be relied on. The tank is quite fast and is further aided by the Hydropneumatic suspension, which allows this tank to manoeuvre the battlefield much like a Leopard, however the abundance of larger, more open maps at higher ranks means that getting from point A to B - and not getting shot - is not a simple as it sounds.

General info

Survivability and armour

Armour Front Sides Rear Roof
Hull 40-80 mm (64-73°) Front glacis
100 (26°), 80 mm (58-66°)Lower glacis
35-40 mm (44°) Top
40 mm (0-55°) Bottom
25 mm (1-46°) 20 mm
Turret 132 mm (12-66°) Turret front
100-200 mm (1-66°) Gun mantlet
132 mm (1-54°)
75 mm (26-61°) Rear
40 mm (1-64°)
40 mm (36-82°) Turret underside
67 mm Front
20 mm Rear
Armour Sides Roof
Cupola 30 mm 30 mm


  • Suspension wheels and tracks are 20 mm thick.
  • Driver's vision port on the front glacis are only 50 mm thick.
  • Hull roof is rated to be 54 mm effective against HE.


Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 59 23 38 1162 1431 30.58 37.66
Realistic 53 21 663 750 17.45 19.74


Main armament

Main article: L7A3 (105 mm)
105 mm L7A3
Capacity Vertical
50 -6°/+9° ±180° Two-plane
Turret rotation speed (°/s)
Mode Stock Upgraded Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
Arcade 22.85 37.9 38.4 42.47 45.18
Realistic 14.28 16.8 20.4 22.6 24.0
Reloading rate (seconds)
Stock Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
10.8 9.6 8.8 8.3
Penetration statistics
Ammunition Type of
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
M392A2 APDS 303 302 296 277 257 252
M393 HESH 127 127 127 127 127 127
M456 HEATFS 400 400 400 400 400 400
Shell details
Ammunition Type of
in m/s
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
0% 50% 100%
M392A2 APDS 1,478 5.8 N/A N/A N/A +1.5° 75° 78° 80°
M393 HESH 730 15 0.4 0.1 4,310 +0° 73° 77° 80°
M456 HEATFS 1,173 11 0.0 0.1 1,270 +0° 65° 72° 75°
Ammo racks
rack empty
rack empty
rack empty
rack empty
50 44 (+6) 16 (+34) 10 (+40) (+49) No

Hull floor empty: 44 (+6)

Machine guns

12.7 mm M2HB
Pintle mount
Capacity (Belt capacity) Fire rate
660 (200) 577 -10°/+40° ±180°
7.62 mm M1919A4
Coaxial mount
Capacity (Belt capacity) Fire rate
4,500 (250) 500 N/A N/A

Usage in battles

The STB-1 can be compared to the Leopard I or even a stock Leopard A1A1, but has its own capabilities in its own right. The STB-1 allows for both a more held down playstyle or aggressive playstyle versus the Leopard I due to its hydropneumatic suspension and two-plane stabilizer. Together with the power of the engine outfitted on the STB-1, allows it to speedily move to a nice sniper spot or hull-down position and fire at targets before they realize a tank could be there.

The STB-1 possesses a pretty nice angled upper front plate, but do keep in mind that the STB-1 wasn't designed to take a punch, only to deal a punch, so even with the good angle you shouldn't rely too heavily on it, as shells can penetrate it and won't always bounce off. Do keep this fully in mind especially when taking more shells with the vehicle, as the fuel tank next to the driver will be filled with extra shells, which can blow up the whole tank if a shell does eventually penetrate.

With the addition of a 12.7 mm machine gun, the STB-1 can make short work of ZSU's or light tanks alike if the heat of the battle doesn't allow for the main gun or in-case of more important targets requiring the main gun's firepower.

The main choice of ammo would usually be HEAT-FS when unlocked, with the occasional APDS for longer range sniping and try not to bring more ammo than required, filling the racks will only hurt more once it blows up.


Tier Mobility Protection Firepower
I Tracks Parts Horizontal Drive
II Suspension Brake System FPE Adjustment of Fire M393A2 NVD
III Filters Crew Replenishment Elevation Mechanism M416 Smoke grenade
IV Transmission Engine Artillery Support M456 Laser rangefinder

Pros and cons


  • Highly mobile, comparable to the German Leopard I
  • More armour than the German Leopard (around 100 mm hull and turret)
  • 105 mm L7 cannon found on other NATO tanks
  • May bounce APHE shells
  • Low profile
  • Utilization of hydropneumatic suspension allows for various offensive and defensive options
  • 12.7 mm Browning M2HB machine gun
  • Two-plane stabilizer that allows it to fire on the move


  • Other areas are lightly armoured, vulnerable to high penetrating SPAA
  • Reload and top speed slower than Leopard
  • Small gun elevation angle
  • Engine can be vulnerable to some aircraft with powerful guns


The prototype for the Type 74. Known in Japanese as 74式戦車の試作車STB-1 (ななよんしきせんしゃのしさくしゃSTB-1). Created in September 1969 along with STB-2 in the STT program. Due to issues with cost effectiveness these two prototypes were not considered for the replacement of the Type 61. In a bid to reduce costs STB-3, STB-4, STB-5 and STB-6 were produced between April 1970 to December 1971. The final judgement for the STT program was held in November 1973 which lead the line to be completed in 1974. And, production started the following year in 1975 for the Type 74.



Read also


Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • other literature.

Japan medium tanks
Chassis Chi-Ha  Chi-Ha · Chi-Ha Kai · Chi-Ha Short Gun
Chassis Chi-He  Chi-He · Chi-He (5th Regiment) · Ho-I · Chi-Nu · Chi-Nu II
Chassis Chi-To  Chi-To · Chi-To Late
Chassis Chi-Ri  Chi-Ri II
Type 61 MBT  ST-A1* · ST-A2* · Type 61
Type 74 MBT  ST-B1* · Type 74 · Type 74G
Type 90 MBT  Type 90 · Type 90 (B)
USA  ▅M4A3 (76) W
  *ST-X Is prototype stage for said MBT