How useful were the Russian warships captured by Japan?
Short answerThey were valuable as fleet-expansion and development tools but were not especially strong front-line warships.
NotesThe captured vessels gave Japan additional hulls at a time when its fleet and industrial base were still growing. They could support training, experimentation, modification, and the expansion of naval organizations even when no longer competitive with the best foreign ships. Their mixed ages and specialized designs limited their value as a coherent front-line force. They helped build a larger navy without becoming its strongest battle units.