The calculated distance (air line) between Komusan Il-tong and Chongjin is approximately 22 miles respectively 35 kilometers.
By car or train, the actual journey to Chongjin is certainly longer, as only the direct route (as the crow flies) between Komusan Il-tong and Chongjin has been calculated here.
Air line (approximately)
35 kilometers
19 nautical miles