The Katori was a Japanese navy training cruiser of 5800 tons displacement launched in 1939. The Katori was powered by three Kanpon boilers providing a top speed of 18 knots and was armed with four 5.5 inch guns' two 5 inch anti-aircraft guns and eight 21 inch torpedo tubes. Found on http://www.probertencyclopaedia.com/browse/RK.HTM