In Japan, switchers is called "Kasha-ido-ki" (=Freight car mover). Kasha-ido-ki have no traffic controle system, such as ATC (Automatic Traffic Controle system) or ATS (Automatic Train Stopper system). So, Kasha-ido-ki is allowed work only on the premises, such as station, factory and private short line.
This is legacy Kasha-ido-ki. It's popular in 1970's JNR (Japan National Railways).
10m.t. Kasha-ido-ki, JR Freight
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Manufactured: Since 1960 by Kyosan Kogyo Co.,Ltd.
Purpose: Station, except main line
Axle: A-A
Height: about half of Freight car (boxcar)
Gross weight: 10m.t. (m.t.=metric ton,1m.t.=1000kg)