Qualla: Eight Patrols and a Midnight Torpedo

Eight Patrols and a Midnight Torpedo: Introduction

Thu, 02 Apr 2026 00:00:00 GMT

She was never going to win the war. By the time Ro-112 slipped out of Kure on her final patrol in January 1945, the Imperial Japanese Navy had already lost the decisive battles -- Midway, the Philippine Sea, Leyte Gulf. The submarine fleet that had once threatened Allied supply lines was being repurposed for desperate rescue missions, ferrying stranded pilots from island to island. Ro-112 was a small boat, a Ro-100 class coastal submarine displacing just 601 tons on the surface, with a crew of 61 and a diving depth of only 75 meters. She had survived seven war patrols across some of the most contested waters in the Pacific. The eighth would be her last.

Eight Patrols and a Midnight Torpedo: Built for Coastal War

Thu, 02 Apr 2026 00:00:00 GMT

Kawasaki laid down Submarine No. 403 at Senshu, Japan, on 20 June 1942. Renamed Ro-112 the following February, she was launched on 25 March 1943 and commissioned that September. The Ro-100 class was derived from the preceding Kaichu type -- medium-sized boats designed for coastal...

Eight Patrols and a Midnight Torpedo: The Picket Line That Broke

Thu, 02 Apr 2026 00:00:00 GMT

Ro-112's most harrowing assignment came in May 1944, when she joined Scouting Line NA, a submarine picket line north of the Admiralty Islands tasked with detecting any Allied move toward the Palau Islands. It was a dangerous posting. On 18 May, U.S. Navy signals intelligence inte...

Eight Patrols and a Midnight Torpedo: From Hunter to Errand Runner

Thu, 02 Apr 2026 00:00:00 GMT

By autumn 1944, the war's trajectory was unmistakable. In August, Submarine Division 51 was disbanded, and Ro-112 was reassigned to the Kure Submarine Squadron as a training vessel. The reprieve was temporary. When Operation Sho-Go 1 activated on 13 October in anticipation of the...

Eight Patrols and a Midnight Torpedo: Eleven Minutes in the Luzon Strait

Thu, 02 Apr 2026 00:00:00 GMT

On the evening of 11 February 1945, Ro-112 was running on the surface in the Luzon Strait near Camiguin Island when the American submarine USS Batfish detected her radar emissions. Batfish picked up the contact at 18:51 at a range of 8,000 yards. She closed, sighting Ro-112 visua...