Located about 2 kilometers south of Cape Tsuzurao, Chikubushima is the second largest island in Lake Biwa after Okishima. It has a circumference of about two kilometers and a maximum elevation of 197 meters. The entire island is a granite monolith with steep rock walls, with only one port located on the southern end.[2] The bottom of the lake around the island is deep, and the western part is the deepest part of Lake Biwa (104.1meters).[3] The temples, shrines and several souvenir shops are located near the harbor. Religious and store employees come from outside the island; the island is uninhabited at night.
The entire island was covered with evergreens until fairly recently. According to the vegetation survey data in Shiga Prefecture from 1972 to 1973, the island had dense groves of Castanopsis, Castanopsis cuspidata, Cinnamomum pedunculatum, Ilex integra, as well as Neolitsea sericea, and Camellia japonica, and Aralia elata among other species.[4] However, from 1977 onward, a population of great cormorants began to colonise the area, displacing the previous existing heron population of the northern portion of the island and increased rapidly in numbers. By 2007 more than 40,000 birds were nesting on the island, creating tremendous environmental damage.[4] Despite efforts to control the population by both non-lethal and lethal means, the population continued to increase to over 60,000 by 2008.[5]
During the Sengoku period, retainers of Azai Nagamasa confined his father Hisamasa to Chikubushima, forcing him into retirement and establishing Nagamasa as his successor.
Several works of the Japanese performing arts relate to Chikubu. They include the Noh play Chikubushima and the Heike Biwa work Chikubushima Mōde, two koto melodies named Chikubushima, a jōruri (itchūbushi), a nagauta, and a tokiwazu-bushi of the same name.
^"カワウ問題". pref.shiga.lg.jp (in Japanese). Shiga Prefectural Government. December 5, 2018. Archived from the original on October 6, 2021. Retrieved April 11, 2022.
^滋賀県教育委員会埋蔵文化財センター (2009). 近江水の宝 竹生島(PDF). pref.shiga.lg.jp (in Japanese). Shiga Prefectural Government. Archived from the original(PDF) on June 11, 2016. Retrieved May 23, 2016.