The term "JNR Class C60" does not correspond to a widely recognized or documented classification within the official locomotive roster of Japanese National Railways (JNR). JNR, the former national railway operator of Japan, utilized a systematic classification for its steam locomotives, such as the C12, C57, and D51 classes, among others. However, no reliable or official sources confirm the existence of a "Class C60" within JNR's historical fleet.
Accurate information is not confirmed regarding the designation "C60" in the context of JNR locomotive classifications. It is possible that "C60" may be a misreference, typographical error, or informal designation with no formal standing in Japanese railway documentation. Alternatively, it may stem from non-authoritative or fictional sources, model railroading contexts, or confusion with similar class designations from other countries.
Given the absence of verifiable records or authoritative references, the term "JNR Class C60" is not recognized in established encyclopedic or railway historical sources.