, also known as Ishigakijima, is a Japanese island south-west of Okinawa Hontō and the second-largest island of the Yaeyama Island group, behind Iriomote Island. It is located approximately south-west of Okinawa Hontō. It is within the City of Ishigaki in Okinawa Prefecture. The city functions as the business and transport center of the archipelago. The island is served by New Ishigaki Airport, the largest airport in the Yaeyamas. Much of the island and surrounding waters including Mount Omoto and Kabira Bay are protected as part of Iriomote-Ishigaki National Park. Ishigaki Island, like the rest of Okinawa, is culturally influenced by both Japan and Taiwan due to its location, about off the north eastern coast of Taiwan. History A tsunami of record height hit Ishigaki Island in 1771. One of the perpetrators of Aum Shinrikyo's sarin gas attack, Yasuo Hayashi, was arrested on Ishigaki Island 21 months after the attacks and from the scene of the crime. Ishigaki Port Located southwest of Okinawa Island and east of Keelung, Ishigaki serves as a gateway to the Yaeyama Islands. Ishigaki Port is the 5th most popular of Japan's cruise ports as of 2017, and 4th for port calls by non-Japanese ships with a weekly call by Star Cruises from Taiwan. Several companies offer daily ferry service to Hateruma, Iriomote, Kohama, and Taketomi Island. Due to Japan's increased focus on grey-zone challenges, Ishigaki Port has been expanded so more than a dozen large (over 1,000 tons) Japan Coast Guard ships can be stationed there. There are currently 11 Kunigami-class large patrol vessels and 2 Hateruma-class large patrol vessels, as well as a Bizan-class small patrol vessel, and a Kagayuki-class patrol craft have been homeported at Ishigaki along with facilities for housing up to 600 crew, making Ishigaki JCG's largest base, surpassing JCG's facilities in Yokohama. Tokyo has currently earmarked ¥21.2 billion yen (US$205 million) in FY2021 to build new patrol boats and buy helicopters for the region, with plans to assign 22 ships of over 1,000 tons (including the 3 Tsugarus, a Kunigami, and a Hateruma class patrol vessel based in Naha) in the region by 2024. Tokyo has also bulked up the JCG presence on Miyako-jima between Ishigaki and Naha with nine Shimoji-class small patrol vessels and a Tokara-class medium patrol vessel The Japan Self-Defense Forces (JSDF) are also considering deploying short range anti-ship missiles (possibly the Type 96 Multi-Purpose Missile System)