During construction her 14 cm/40 11th Year Type naval gun[3] was removed, making room for four Kaiten manned suicide torpedoes.

[4] After a week of exercises I-58 took on fuel, provisions and torpedoes, and embarked four Kaiten and their crews, before departing Kure with I-36 on 31 December 1944.

She arrived back at Kure on 22 January 1945 and was credited with sinking an escort carrier and a large oiler,[4] but the attack was not successful.

On 11 March I-58 was stationed off Okinotorishima to act as a radio relay ship for 24 Yokosuka P1Y "Frances" twin-engined kamikaze bombers.

[4] After returning to Kure for further training, I-58 was attached to the Tatara group, with I-44, I-47 and I-56, formed to attack American shipping as part of Operation Ten-Go.

I-58 was unable to penetrate the intense U.S. anti-submarine defences, and was forced to return to Kyushu on 10 April to recharge batteries.

Shortly afterwards the navigation officer Lt. Tanaka spotted a ship approaching from the east, making 12 knots (22 km/h; 14 mph) and not zigzagging.

She was in fact the heavy cruiser USS Indianapolis, and had sailed from Guam for Leyte the previous day, after having delivered parts and nuclear material for the Hiroshima and Nagasaki atomic bombs to Tinian from San Francisco.

The ship stopped, listed to starboard, and was down by the bow, but Hashimoto decided to attack again and dived to 100 feet (30 m) to open the range and reload torpedo tubes.

[4] On the morning of 9 August, 260 miles north east of Aparri, Luzon, I-58 sighted a zigzagging "convoy of ten transports" escorted by three destroyers, and Kaiten No.

In fact the "convoy" was the hunter-killer team Task Group 75.19 led by the escort carrier USS Salamaua, carrying out anti-submarine sweeps between Leyte and Okinawa.

Kaiten No.4 sighted again over an hour later and again attacked with depth charges which resulted in a violent explosion, throwing water 30 feet (9.1 m) into the air.

[4] Around 17:00 on 12 August 1945, 360 miles south-east of Okinawa, while I-58 was running northwards on the surface at 12 knots (22 km/h; 14 mph), her Type 3 radar detected multiple targets.

Half an hour later Nickel sighted another periscope astern of Oak Hill, and fired depth charges.

On 1 April 1946 in "Operation Road's End" I-58, stripped of all usable equipment and material, was towed from Sasebo to an area off the Gotō Islands by the submarine tender USS Nereus and scuttled at 32°37′N 129°17′E / 32.617°N 129.283°E / 32.617; 129.283.