This snow fighter is model Ki620, it's already retired and a succesor is DD53. Ki620 has steam engine, boiler is for C12 (Steam locomotive) and tender is for C58 (Steam locomotive).
JNR (Japan National Railways) Model Ki620
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Manufactured: Since 1948
Purpose: Main line, Rotrary system
Axle: 3-2 + 2-2
Gross weight: 84.5m.t. (m.t.=metric ton,1m.t.=1000kg)