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|Name:||Ramb II, later Calitea II|
|Launched:||Banana boat, 1937|
|Reclassified:||Auxiliary cruiser, 1940|
|Fate:||Scuttled by her crew in Kobe harbor, 8 September, 1943 later refloated by Japan, 1943|
|Commissioned:||30 November, 1943|
|In service:||3 October, 1943|
|Struck:||5 February, 1945|
|Fate:||Sunk, 12 January 1945|
|Displacement:||3,667 long tons (3,726 t)|
|Length:||122 meters (on water line)|
|Speed:||18.5 knots (21.3 mph; 34.3 km/h)|
|Armament:||• 2 × 120 mm (4.7 in) guns
• 8 × 13.2 mm (0.52 in) anti-aircraft guns
|Part of:||Red Sea Flotilla|
Ramb II was the second of four sister ships all built to the same design. The other ships were the Ramb I, the Ramb III, and the Ramb IV. The four ships were built for the Royal Banana Monopoly Business (Regia Azienda Monopolio Banane) to transport refrigerated bananas from Somaliland and Eritrea in Italian East Africa. However, in the event of war, the design of Ramb II allowed it to be refitted as an "auxiliary cruiser" for commerce raiding. She was 3,667 tons displacement, oil powered, and capable of 18½ knots.
Following Italy's declaration of war on 10 June 1940, Ramb II became part of the Italian Royal Navy (Regia Marina). She was armed with two 4.7-inch (120 mm) guns and eight 13.2-millimetre (0.52 in) anti-aircraft guns. The refitting work to convert the banana boat to an auxiliary cruiser was performed at the Eritrean port of Massawa. Ramb II was part of the Italian Navy's Red Sea Flotilla.
In February 1941, as the East African Campaign started to go badly for the Italians, Massawa, the home port for Ramb II became more endangered. Along with Eritrea and Ramb I, Ramb II slipped through a British blockade off Perim and sailed into the Indian Ocean on 20 February 1941. On 27 February 1941 Ramb I was intercepted and sunk by cruiser HMNZS Leander, but the other two sailed across the Indian Ocean and the Sunda Sea.
On 23 March 1941, Ramb II reached Kobe, Japan. Upon reaching Japan, Ramb II was supposed to operate as a commerce raider in the Pacific Ocean. Even though allied with Italy, the authorities of then neutral Japan took a dim view of the idea of an Italian raider operating from neutral Japanese ports. The Japanese refused to comply with the Italian plans. Ramb II had her weapons removed on 24 March, 1941. Her name was changed to Calitea II in May, 1941. She was chartered to the Imperial Japanese Navy as a stores ship 2 November, 1942. When Italy declared an armistice in 1943, the Italian crew scuttled her at Kobe on 8 September to prevent the Japanese from taking control of the ship. The Japanese refloated the Calitea II, renamed her Ikutagawa Maru and pressed her into service. Her IJN callsign was JXBY.
Initially she was assigned as an auxiliary transport ship (victualler) in the Sasebo Naval District. In January 1944 she was reassigned to the Combined Fleet and attached to the Southwest Area Fleet as an auxiliary transport ship. She remained in Japanese service until 12 January 1945, when she was sunk by aircraft of the United States. 
- "Ex-Italian Merchants in Japanese Service". Combinedfleet.com. Retrieved 3 April 2013.
- Ramb I
- Ramb III
- Ramb IV
- Italian Royal Navy - RN Ramb II
- Imperial Japanese Navy - Calitea II
- East African Campaign
- Armed merchantmen