Question: Enola Gay was one of the bombers that targeted the largest city on what Japanese island?

full_context: Document 1: Little Boy: "Little Boy" was the codename for the atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II by the Boeing B-29 Superfortress "Enola Gay", piloted by Colonel Paul W. Tibbets, Jr., commander of the 509th Composite Group of the United States Army Air Forces. It was the first atomic bomb to be used in warfare. The Hiroshima bombing was the second artificial nuclear explosion in history, after the Trinity test, and the first uranium-based detonation. It exploded with an energy of approximately 15 ktonTNT . The bomb caused significant destruction to the city of Hiroshima and its occupants.
Document 2: Bockscar: Bockscar, sometimes called Bock's Car, is the name of the United States Army Air Forces B-29 bomber that dropped a Fat Man nuclear weapon over the Japanese city of Nagasaki during World War II in the second – and last – nuclear attack in history. One of 15 Silverplate B-29s used by the 509th, "Bockscar" was built at the Glenn L. Martin Aircraft Plant at Bellevue, Nebraska, at what is now Offutt Air Force Base, and delivered to the United States Army Air Forces on 19 March 1945. It was assigned to the 393d Bombardment Squadron, 509th Composite Group to Wendover Army Air Field, Utah in April.
Document 3: Iccho Itoh: Iccho Itoh (伊藤 一長 , Itō Itchō , August 23, 1945 – April 18, 2007) , born Kazunaga Itō (伊藤 一長 , Itō Kazunaga ) , was the mayor of the Japanese city of Nagasaki; he first took office in 1995. He was a graduate from Waseda University, and majored in political science.
Document 4: Nagasaki: Nagasaki (長崎市 , Nagasaki-shi , ]) (   ) is the capital and the largest city of Nagasaki Prefecture on the island of Kyushu in Japan. It became a centre of Portuguese and Dutch influence in the 16th through 19th centuries, and the Churches and Christian Sites in Nagasaki have been proposed for inscription on the UNESCO World Heritage List. Part of Nagasaki was home to a major Imperial Japanese Navy base during the First Sino-Japanese War and Russo-Japanese War. Its name means "long cape".
Document 5: Enola Gay: The Enola Gay ( ) is a Boeing B-29 Superfortress bomber, named for Enola Gay Tibbets, the mother of the pilot, Colonel Paul Tibbets, who selected the aircraft while it was still on the assembly line. On 6 August 1945, during the final stages of World War II, it became the first aircraft to drop an atomic bomb. The bomb, code-named "Little Boy", was targeted at the city of Hiroshima, Japan, and caused unprecedented destruction. "Enola Gay" participated in the second atomic attack as the weather reconnaissance aircraft for the primary target of Kokura. Clouds and drifting smoke resulted in a secondary target, Nagasaki, being bombed instead.
Document 6: Yokohama: Yokohama (Japanese: 横浜市 , Hepburn: Yokohama-shi ) is the second largest city in Japan by population, after Tokyo, and the most populous municipality of Japan. It is the capital city of Kanagawa Prefecture. It lies on Tokyo Bay, south of Tokyo, in the Kantō region of the main island of Honshu. It is a major commercial hub of the Greater Tokyo Area.
Document 7: Fat Man: "Fat Man" was the codename for the atomic bomb that was detonated over the Japanese city of Nagasaki by the United States on 9 August 1945. It was the second of the only two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third-ever man-made nuclear explosion in history. It was built by scientists and engineers at Los Alamos Laboratory using plutonium from the Hanford Site and dropped from the Boeing B-29 Superfortress "Bockscar". For the Fat Man mission, "Bockscar" was piloted by Major Charles W. Sweeney.
Document 8: George Benedict Zabelka: George B. Zabelka, a Catholic chaplain with the U.S. Army Air Force, was stationed on Tinian Island in the South Pacific in 1945, where he was assigned to 509th Composite Group. This is the unit of the crews of "Enola Gay" and "Bockscar" (aka Bock’s Car and Bocks Car), that dropped the Atomic Bombs (”Little Boy” and “Fat Man”) on Hiroshima and Nagasaki. His duties included saying Mass on Sunday and during the week, hearing confessions, talking with the soldiers, and other typical duties of a wartime chaplain.
Document 9: Takamatsu, Kagawa: Takamatsu (高松市 , Takamatsu-shi , ]) is a city located in central Kagawa Prefecture on the island of Shikoku in Japan, and is the capital city of the prefectural government. It is designated a core city by the Japanese Government. It is a port city located on the Seto Inland Sea, and is the closest port to Honshu from Shikoku island. For this reason it flourished under the Daimyo (feudal lords) as a castle town in the fiefdom of Takamatsu, during the Edo Period. Takamatsu is a city with a large concentration of nationwide companies' branch offices, which play a large role in its economy, and it contains most of the national government's branch offices for Shikoku. The castle tower formerly used as the symbol of the city was destroyed during the Meiji Period. In 2004, construction of the Symbol Tower, the new symbol of Takamatsu, was completed. The Symbol Tower is located in the Sunport area of the city. The Symbol Tower is the tallest building in Takamatsu, and is right next to another tall building The JR Clement Hotel (formerly the ANA Clement Hotel), which is also part of the Sunport complex.
Document 10: Paul Tibbets: Paul Warfield Tibbets Jr. (23 February 1915 – 1 November 2007) was a brigadier general in the United States Air Force. He is best known as the pilot who flew the "Enola Gay" (named after his mother) when it dropped Little Boy, the first of two atomic bombs used in warfare, on the Japanese city of Hiroshima.
Document 11: Robert A. Lewis: Robert Alvin Lewis (October 18, 1917 – June 18, 1983) was a United States Army Air Forces officer serving in the Pacific Theatre during World War II. He was the co-pilot of the "Enola Gay", the B-29 Superfortress bomber which dropped the atomic bomb Little Boy on the Japanese city of Hiroshima on 6 August 1945.
Document 12: Osaka: Osaka (大阪市 , Ōsaka-shi ) (] ;    ) is a designated city in the Kansai region of Japan. It is the capital city of Osaka Prefecture and the largest component of the Keihanshin Metropolitan Area, the second largest metropolitan area in Japan and among the largest in the world with over 19 million inhabitants. Situated at the mouth of the Yodo River on Osaka Bay, Osaka is the second largest city in Japan by daytime population after Tokyo's 23 wards and the third largest city by nighttime population after Tokyo's 23 wards and Yokohama, serving as a major economic hub for the country.
Document 13: Nagoya Castle (Hizen Province): Nagoya Castle (名護屋城 , Nagoya-jō ) was a castle located in the old Hizen Province of Japan, now split between modern Saga and Nagasaki prefectures. The historic castle was the base from which Toyotomi Hideyoshi launched his invasions of Korea. None of the original structures remain, but the castle's ruined foundations survive in the formerly separate town of Chinzei, now part of the city of Karatsu in Saga Prefecture .
Document 14: Hiroshima: Hiroshima (広島市 , Hiroshima-shi , ]) is the capital of Hiroshima Prefecture and the largest city in the Chūgoku region of western Honshu - the largest island of Japan. The city's name, 広島, means "Broad Island" in Japanese. Hiroshima gained city status on April 1, 1889. On April 1, 1980, Hiroshima became a designated city. s of August 2016 , the city had an estimated population of 1,196,274. The GDP in Greater Hiroshima, Hiroshima Metropolitan Employment Area, is US$61.3 billion as of 2010. Kazumi Matsui has been the city's mayor since April 2011.
Document 15: George R. Caron: Technical Sergeant George Robert "Bob" Caron (October 31, 1919 – June 3, 1995) was the tail gunner, the only defender of the twelve crewmen, aboard the B-29 "Enola Gay" during the historic bombing of the Japanese city of Hiroshima on 6 August 1945. Facing the rear of the B-29, his vantage point made him the first man to witness the cataclysmic growth of the mushroom cloud over Hiroshima.
ground_truth: Kyushu