The Type 95 So-Ki was an
armored railroad car of the
Imperial Japanese Army
The was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor o ...
. It was used for patrolling and guarding railway lines in both
Manchuria
Manchuria is an exonym (derived from the endo demonym " Manchu") for a historical and geographic region in Northeast Asia encompassing the entirety of present-day Northeast China (Inner Manchuria) and parts of the Russian Far East (Outer Manc ...
and
Burma
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
. The chassis was based on the
Type 95 Ha-Go light tank. The Type 95 So-Ki had light armor and no fixed weapons armament. Hand-held weapons by the crew would be the only armament available. It had a simple
suspension system with
bogie
A bogie ( ) (in some senses called a truck in North American English) is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transp ...
wheels suspended on
bell cranks on each side of the chassis. The tracks were driven through the front sprockets. There were three small return wheels.
The Type 95 So-Ki was unique as it had both a track and wheel drive system. The vehicle could be changed between railway line wheels mode and track mode for ground use within a few minutes time as it had retractable wheels. In addition, the width of the wheels could be
adjusted to the various widths of the
rail gauge
In rail transport, track gauge (in American English, alternatively track gage) is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible with the track gauge. Since many d ...
s.

The Type 95 So-Ki was produced between 1935 and 1943, with 121 to 135 units made.
Notes
References
Taki's Imperial Japanese Army Page - Akira Takizawa*
{{WWIIJapaneseAFVs
Armoured cars of Japan
Armoured cars of the interwar period
World War II armoured fighting vehicles of Japan
Military vehicles introduced in the 1930s
Military draisines
Mitsubishi
Rail and road vehicle