Three-Wheeled Harleys Made in Japan
Harley-Davidson has a long and storied history in Japan, and I covered the larger background in the four-part Harley Goes to the Far East series: Part 1, Part 2, Part 3, and Part 4. This page focuses on one unusual branch of that story: a heavy-duty three-wheeled Harley built in Japan in 1934.
At first glance, these machines look like a Servi-Car on steroids. That description still works as shorthand, but the details point to something more substantial. Rather than starting with the American 45-inch delivery trike, Japanese builders used the larger Harley-Davidson VL, replaced the motorcycle rear wheel with a cargo axle, and braced the rear of the machine for serious commercial work.
A Japanese VL Cargo Trike, Not a Servi-Car
The important mechanical detail is the starting point. These cargo trikes started as Harley-Davidson VL's powered by 1200cc flathead V-twins. By comparison, the U.S.-built Harley-Davidson Servi-Car used the smaller 750cc flathead. That makes the Japanese machines closer to big-twin commercial truck conversions than light delivery trikes.
The original single rear wheel was removed and replaced with a two-wheel axle. That axle connected to the motorcycle through a 3-speed transmission and a longer drive chain. To handle the extra payload, additional frame members were mounted down each side of the motorcycle, giving the rear half of the machine a car-like structure instead of a normal motorcycle tail.
That construction explains why the old comparison is tempting while still needing qualification. A Servi-Car was a useful American service machine, but the Japanese VL cargo trikes used a larger engine, heavier rear structure, and wider commercial bodywork. The result was a compact business vehicle meant to carry real weight.
They also fit naturally beside other Harley-Davidson utility experiments of the period. Harley's own motorcycle-truck experiments show how often builders tested the boundary between motorcycle and truck in the early commercial-vehicle market. The Japanese VL trikes approached that same problem with a big-twin front half and a locally engineered cargo rear.
Harley-Davidson in Japan Before Rikuo
The 1934 date matters because it falls between importation and domestic production. Daiichi Sankyo history places Harley-Davidson importing through the Koto Trade network in 1923. By 1924, Alfred Rich Child and Sankyo capital were behind the Harley-Davidson Motorcycle Sales Company of Japan, which built the sales, parts, service, and training network that made Harley combinations practical in Japan.
Those machines were not just leisure motorcycles. Harley sidecar and utility outfits found work in police, ceremonial, commercial, and military roles. Japan already had strong reasons to value compact utility vehicles, and a heavy motorcycle with sidecar or cargo capacity could be cheaper, narrower, and more convenient than a full automobile or truck.
By the early 1930s, exchange rates, tariffs, and the need for local production were pushing the Harley-Sankyo relationship toward Japanese manufacture. The Shinagawa factory became the center of that shift, and by 1935 Japanese-made Harley-derived motorcycles were emerging under the Rikuo name. A related VL prepared for Japanese military use shows how specialized Japanese requirements were already shaping Harley orders before the Rikuo name fully took over.
That is why the 1934 cargo trikes should be described carefully. They appear to be Japanese-built or Japanese-engineered conversions of imported Harley-Davidson VLs, not ordinary production Rikuos. The original article noted that 1934 was the last year all Harleys in Japan were imported; in context, these trikes sit in that final import-only moment, just before Shinagawa/Rikuo production moved the story into full Japanese manufacture.
What the 1934 Photos Show
The four surviving photographs are valuable because they show more than a single oddball prototype. One vehicle appears with Toyo Otis Elevator markings, another is National-branded and posed with business equipment, another uses an open cargo body with Japanese lettering, and one is an enclosed Singer service van. The body styles vary, but the purpose is consistent: compact commercial transport built around Harley big-twin hardware.
The engineering pattern is consistent across the group. Each machine keeps the Harley motorcycle front end and power unit, then replaces the ordinary rear of the motorcycle with a wide two-wheel cargo section. The rear axle, bodywork, and added side rails separate these vehicles from normal motorcycle-sidecar outfits. They are three-wheel cargo vehicles, not stock motorcycles with sidecars attached.
The bodywork shows how adaptable the platform could be. Elevator service, office-machine service, open freight hauling, and sewing-machine delivery all required vehicles that could carry tools, parts, and merchandise. A VL-based three-wheeler gave Japanese businesses something narrower and simpler than a truck, but stronger than a light motorcycle delivery rig.
From Imported Harleys to Rikuo and the Type 97
The cargo trikes were only one chapter in the Japanese three-wheel Harley story. Once local manufacture was underway, the Harley-derived big twin became part of the Rikuo line. Bohon’s reconstruction gives 1,479 Rikuos built at Shinagawa from 1935 to 1940, while the Society of Automotive Engineers of Japan summarizes the same prewar big Rikuo production at roughly 1,500 machines. Those figures belong to the Rikuo production story, not to the 1934 VL cargo trikes, but they show how quickly the program moved from import and conversion to domestic manufacture.
The most important later three-wheel descendant was military rather than commercial. In 1937, the Japanese Army adopted the Type 97 sidecar motorcycle, a Harley-derived outfit with drive to the sidecar wheel for better traction in mud, sand, and rough ground. By the end of World War II, more than 18,000 Type 97 military sidecar outfits had reportedly been built by all manufacturers combined.
That Type 97 history should not be confused with the 1934 cargo trikes shown here. The Type 97 was a military sidecar-drive machine. These trikes were commercial cargo conversions built from imported VLs. The shared lesson is that Japanese engineers were adapting Harley-Davidson architecture to local requirements instead of treating the American motorcycle as a fixed object.
The postwar Rikuo story carried the heavy flathead layout even further. Period Japanese technical material from the late 1950s still shows Rikuo selling 1208cc sidecar passenger and cargo machines alongside smaller 747cc models. By then, the Harley-derived design had become part of Japanese motorcycle history in its own right.
What Still Is Not Known
I still have not found the Japanese period name for these 1934 VL cargo trikes. The functional “rear car” idea appears in some Japanese three-wheel descriptions, but that is not the same thing as a confirmed model name for the machines in these photographs. Until a factory catalog, period advertisement, registration record, or parts list turns up, the safest description is Japanese-made or Japanese-engineered Harley VL cargo trike.
I also have not found a patent or utility-model record that can be tied securely to the rear-axle conversion. That does not mean one never existed. It only means the accessible record has not produced one. The same caution applies to exact production numbers: the photographs prove that more than one vehicle existed and that several body types were used, but they do not tell us how many were built.
There are broader chronology questions around the earliest Shinagawa output and the last postwar Rikuo or Harley-derived three-wheel machines. Some sources push early Japanese production slightly earlier or later, and postwar end dates are not always consistent. Those disputes do not change the central point, but they are a warning against making the 1934 cargo trikes sound more settled than the evidence allows.
What can be said with confidence is that these machines were more than a curiosity. They mark the moment when imported Harley-Davidson VLs, Japanese commercial needs, and local engineering practice met in one practical vehicle. Before Rikuo became the familiar name and before the Type 97 became the best-known military descendant, these three-wheeled Harleys showed how Japan was already turning the Harley-Davidson big twin into something bigger, heavier, and useful for everyday work.