Japanese large cruiser Submarine I-7 and I-8 1933

Built in 1933, in 1946 all gone.  With a displacement of 1.995 (standard)-2.525 (normal surface) tons and as dimensions 109.3 x 9.1 x 5.26 metres. Diving depth 100 metres. Diving time 60 seconds. Submerged endurance 20 hours with a speed of 3 knots.  Torpedo tubes 6 (forward).  One aircraft.  Battery 5.000 AH, 480 cells, 240 volts.  Engines 2 cycle diesels supplying 11.200 shp. Speed 23 (surfaced)-8 (submerged) tons. Range 20.000 nautical miles with a speed of 10 knots. Riveted double hull made of D-steel 

Source 

U.S. Naval Technical Mission to Japan. Report S-01-1 Characteristics of Japanese naval vessels article 1 submarines. Dated January 1946.