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  I-25 Japanese Submarine

6 x torpedo tubes
with 17 torpedoes
1 x 140mm deck gun
1 x E14Y floatplane

Wartime History
The I-25 operated off the United States West Coast, sinking two American freighters and damaging another. With only one torpedo remaining, Captain Tagami was preparing to conclude his patrol.

On March 8, 1942 off Wellington launched their E14Y Glen floatplane piloted by by W/O Fujita Nobuo that overflew the city and returned safely. Afterwards, proceeded to Auckland and during the night of March13, 1942 the same floatplane piloted by W/O Fujita Nobuo over flew the city and returned safely.

On October 4, 1942, I-25 sinks tanker SS Camden off Coos Bay on the southern coast of Oregon.

On October 11, 1942 spotted two submarines on the surface 500 miles west of Seattle. Mistaken for a U. S. Navy submarines, I-25 fired her last remaining torpedo at the target, hitting and sinking Soviet Submarine L-16.


On July 25, 1943 departs on her seventh war patrol with Captain Miyazaki Takeji to conduct an aerial reconnaissance over Espiritu Santo.

On August 23, 1943 I-25 launches her floatplane on a reconnaissance mission over Espiritu Santo and observes "three battleships" and smaller vessels.

On August 24, 1943 I-25 reports the results of the reconnaissance flight by radio, the last message received from this submarine.

Sinking History
Likely, on August 25, 1943 USS Patterson DD-392 was escorting a convoy bound for New Hebridesand makes radar contact with this submarine and closes to 4,000 yards before I-25 dives. Picked up on sonar, the destroyer drops depth charges and likely sinks the submarine at roughly Lat 13-10S, Long 165-27E.

The Japanese Navy was unaware of the loss of the submarine. On September 16, 1943 I-25 is ordered to make a reconnaissance flight over Suva on Fiji on September 20, 1943, but I-25 does not acknowledg receipt of the order. Officially declared lost with the entire crew of 100 in the Fiji area. Officially removed from the Navy list on December 1, 1943.

Combined Fleet - I-25 Tabular Record of Movement

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Last Updated
June 29, 2019


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