The Type 89 Medium Tank
By Mike Bennighof, Ph.D.
October 2006

The Imperial Japanese Army saw little combat in the First World War, its battlefield experience not extending far beyond conquest of the German naval base at Tsingtao. Observers attached to the British Army tried to keep their superiors informed of new developments, and when reports came of the strange new machines called “tanks,” the Japanese asked the British to provide a sample.

A British Mark IV tank was imported in 1918, along with a British crew to demonstrate its capabilities. Over the next several years the Imperial Army obtained a total of 16 tanks of various models, and in 1925 decided to form a force of four tank battalions. A few Renault M1917 light tanks were imported to train a cadre, while Japanese tank designers led by the young engineer Tomio Hara began work on the first domestic tank design.

Japan’s medium tank, the Type 89.

Lacking a domestic automobile industry, the Japanese had to design almost every aspect of their new tank from scratch. Where other countries could order parts and sub-assemblies “off the shelf,” Osaka Arsenal would have to make over 10,000 parts for Hara’s first design. Work began in May 1926 and a prototype rolled out in February of the next year.

Known as “Experimental Heavy Tank I,” this vehicle had a main turret with a short-barreled 57mm gun and two smaller turrets each holding one machine gun. This design feature stood at the cutting edge of tank development at the time — French, British, German and Soviet designs all featured machine guns in separate turrets. Hara and his engineers had developed several innovative features, particularly the suspension. The tank was made of mild steel, and on its trials in June proved very slow — but the Imperial Army’s generals who assembled to view the experiment seemed thrilled that it moved at all. The army’s future tanks, they declared, would be made in Japan.

They did not, however, place an order for series production of the new tank. Despite the generals’ enthusiasm, the army ordered several dozen Renault NC tanks, a modified version of the FT17, and designated them OTSU. They also ordered several sample tanks from British firms. Although Hara had proven that Japanese engineers could design a tank essentially from scratch and do so in an amazingly short period, and Osaka Arsenal had managed to build it, Japanese industry could not produce acceptable armor plate for tanks.

Several more years would pass before Nihon Steel rolled out armor suitable for tanks.
Mitsubishi Heavy Industry finally received an order in 1929 for Japan’s first domestic tank, a design derived from the British Vickers Medium C, known in Japan as the Type 89 Light Tank. Later re-designated a Medium Tank, the Type 89 like most Japanese weapons took its title from the Japanese year in which is was introduced — 2589 or 1929, 2589 years from the divine founding of the Japanese monarchy in 660 B.C. The Type 89 also carried a short-barreled 57mm gun, could make 15 miles per hour and weighed 12 tons. It had only 15mm of armor, sufficient to keep out machine-gun fire but little else. The vehicle went into series production in 1931 and several saw action around Shanghai.

A Type 89B on trials.

The prospect of large-scale actions in China renewed Japanese interest in tanks. The Type 89 performed better than the French NC Renault, but still showed some problems: The space directly beneath the gun was completely open, and Chinese machine gunners soon discovered they could spray the crew with impunity. The gasoline engine tended to overheat very quickly in hot weather and could not be easily started in cold weather. The low speed did not bother the Japanese; the proper place for tanks was alongside infantry, and they saw no need for greater performance.

Improvements to the Type 89 followed, with an armored gun mantlet quickly fitted. Mitsubishi had just developed an air-cooled diesel engine that showed promise as a power plant for tanks, and in 1933 a new model, designated Type 89B, appeared with this engine although the gasoline version remained in production until 1936. Though Japanese tank development lagged years behind other nations, in this area they were more advanced than even the United States or Germany until the end of World War II. the Mitsubishi diesel, produced in 6-, 8- and 12-cylinder versions, greatly reduced the risk of fire, used less fuel and did not require the high-grade gasoline that Japan increasingly could not produce as the war dragged on.

The Type 89 first saw action in the Shanghai Incident in February 1932, when the 2nd Independent Tank Company took five Type 89 and 10 NC tanks to support the Japanese naval troops fighting in and around the city. In March 1933 the 1st special tank Company equipped with 11 of the tanks fought in Jehol Province in North China, making an advance of 190 miles in three days.

Japanese tankers confer in front of a Type 89 Medium Tank at Nomonhan, 1939.

Japan gave emphasis to production of warships and aircraft, with few resources devoted to armored vehicles. Thus the Type 89 soldiered on even after a much better tank, the Type 95 Chi-Ha, entered production in 1935. The Type 89 made up about half the Japanese tank force at Nomonhan in 1939, where it was completely outclassed by Soviet BT-type fast tanks. Their last wide-spread use came in 1941 and early 1942 during the invasion of the Philippines, where even the American M3 light tank proved superior, and in Burma against British and Indian forces.

The Type 89 features heavily in Panzer Grenadier: Asian Desert. The tanks lumber into action in several scenarios at regimental strength, but are no match for the speed and firepower of Soviet tanks. The Japanese player will need to maneuver carefully and keep close to his supporting infantry, which is very capable in close assaults.

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