Which island was used for the Japanese fleet's staging point for the attack on Pearl Harbor?

On December 7, 1941 the Japanese launched a surprise attack on the U.S. Naval Base Pearl Harbor in Hawaii, using bombers, torpedo bombers and midget submarines. On December 8, President Franklin D. Roosevelt delivered a speech, known as the “Infamy Speech” to the citizens of America. He informed America of what had happened while the US was in the midst of peace talks with Japan. That same day, America entered into World War II.

Prior to the attack on Pearl Harbor, Admiral Isoroku Yamamoto on November 22, 1941 ordered the Imperial Japanese Navy strike force for the Hawaii Operation attack on Pearl Harbor to meet in Tankan or Hitokappu Bay, in South Kurile. This place was chosen as a staging point for its sparse population, lack of foreigners, and constant fog coverage. The Admiral started the staging actions against Hawaii on November 26.

Noting the Pearl Harbor attack plan, it was conceived by Admiral Isoroku Yamamoto, Commander in Chief of the IJN. Yamamoto had studied in America. He knew Japan lacked the ability to defeat the larger industrial rich U.S. Plus he did not think American officers were too weak willed to fight. But his strong arguments against going to war with the U.S. were overruled by the Japanese High Command. Japan believed that an attack that used aircraft carriers against the U.S. would be very successful. It was essentially a last best hope for Japan; this could allow Japan to win its Pacific war. It didn't. The U.S. rebounded quickly. It won.