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The Yokohama Maru was a 6,143-gross register ton passenger and cargo vessel built by Mitsubishi Dockyard & Engine Works, Nagaski for Nippon Yusen Kabushiki Kaisha and launched in 1912. The ship was used on the Guam to Japan route. She was requisitioned by the Imperial Japanese Army and fitted out as a troop transport.

Invasion of Guam

On 8 December 1941, she was assigned to Operation "G", the invasion of Guam as one of 10 transports carrying Major General Horii Tomitaro's 55th Infantry Corps. The naval operation was headed by the 4th Fleet operating out of Saipan consisting of minelayer Tsugaru as flagship; seaplane tender Kiyokawa Maru; 4 cruisers, Aoba, Furutaka, Kako, Kinugasa (Cruiser Division 6, detached from 1st Fleet); and 4 destroyers, Oboro (detached from Carrier Division 5 of the IJN 1st Air Fleet), and Kikuzuki, Uzuki, and Yūzuki (Destroyer Division 23, detached from Carrier Division 2, IJN 1st Air Fleet). The remaining ships all belonged to the Fifth Base Force, 4th Fleet consisting of Gunboat Division 7 (Hirotama Maru, Shotoku Maru), Subchaser Division 59 (subchasers Shonan Maru No. 5, Shonan Maru No. 6; netlayer Shofuku Maru), Subchaser Division 60 (subchasers Kyo Maru No. 8, Kyo Maru No. 10; netlayer Shuko Maru), and Minesweeper Division 15 (Fumi Maru No. 2, Seki Maru No. 3).

Invasion of Salamaua–Lae

On 10 March 1942, while being unloaded off Salamaua, Yokohama Maru was attacked as part of the invasion fleet at Lae and Salamaua and was sunk at 07°01′S 147°07′E / 7.017°S 147.117°E / -7.017; 147.117 (Yokohama Maru). She was the first ever victim of American aerial torpedo Mk. 13

Notes

1. "Lloyd's Register 1938–39" (PDF). plimsollshipdata. Retrieved 13 December 2010.
2. ^ Hackett, Bob; Muehlthaler, Erich; Whitman, John (2016). "Yokohama Maru -Tabular Record of Movement". combinedfleet.com. Retrieved 30 January 2021.
3. Niehorster, Leo; Alsleben, Al; Yoda, Tadashi. "Administrative Order of Battle - 5th Base Force, 4th Fleet, Combined Fleet, 7 December 1941". Imperial Japanese Armed Forces.
4. "Kongo Maru". The Combined Fleet. Retrieved 13 December 2010.

External links

• Chronological List of Japanese Merchant Vessel Losses

v t e Shipwrecks and maritime incidents in March 1942
Shipwrecks	1 Mar: USS Edsall, HMS Encounter, HNLMS Evertsen, HMS Exeter, USS Houston, USS Pecos, HMAS Perth, USS Pope, Rooseboom, U-656 2 Mar: HNLMS Banckert, USAT Don Esteban, Ha-13, HNLMS K X, HNLMS K XIII, HNLMS K XVIII, HNLMS Koning der Nederlanden, USS Pillsbury, USS Stewart, Toendjoek, Van Waerwijck, HNLMS Witte de With 3 Mar: USS Asheville, Koolama, SS Mary, USS Perch 4 Mar: HMAS Yarra 5 Mar: Auby 6 Mar: HNLMS Pieter de Bitter, Rononia 7 Mar: Arabutan, HNLMS Gouden Leeuw, Nyggjaberg, Uniwaleco 8 Mar: HNLMS Eland Dubois, HNLMS Jan van Amstel, Smyshlyony 10 Mar: Lady Nelson, Kongō Maru, Tenyo Maru, Yokohama Maru 11 Mar: HMS Naiad 12 Mar: Texan 13 Mar: Tama Maru No. 2, Tolten 14 Mar: U-133 15 Mar: U-503, HMS Vortigern 17 Mar: Île de Batz, San Demetrio 18 Mar: E.M. Clark 19 Mar: Papoose 20 Mar: HMS Heythrop 21 Mar: Vamar 23 Mar: British Prudence 24 Mar: HMS Southwold, U-655 26 Mar: HMS Jaguar, HMS Legion, HMS P39 27 Mar: USS Atik, U-587, Equipoise 28 Mar: HMS Campbeltown, Raceland 29 Mar: Hertford, Z26 30 Mar: U-585 Unknown: Emilia, Panay
Other incidents	2 Mar: Ruth Kellogg, HMS Walney 4 Mar: USS Sargo, HMAS Tambar 5 Mar: Takao Maru 10 Mar: China Maru, Tama Maru No. 2 11 Mar: Komintern 15 Mar: Olean 16 Mar: Irish Willow, U-753 22 Mar: Kingston 23 Mar: USS Gato 25 Mar: Imperial Transport Unknown date: USS Drum
1941 1942 1943 February 1942 April 1942

7°01′S 147°07′E / 7.017°S 147.117°E / -7.017; 147.117

• 1912 ships
• Auxiliary ships of the Imperial Japanese Navy
• Ships sunk by US aircraft
• Shipwrecks of Papua New Guinea
• Maritime incidents in March 1942