Ōkunoshima

is a small island in the Inland Sea of Japan. It is sometimes called  because there are a lot of rabbits on the island.

Ōkunoshima played a big part in the Second Sino-Japanese War because it had a poison gas factory for Japan's chemical warfare in China.Ian Buruma, The Wages of Guilt: Memories of War in Germany and Japan, (New York: Meridan, 1994), 111.

 References 

 Other websites 

Up-to-date information on getting to Rabbit Island
Rabbit Island Kyukamura Ohkunoshima 
Paper from Dr. Yukutake on poison gas usage and treatment
Documentary film about Ōkunoshima and Japan's poison gas history