Their full names were Kin Narita (成田 きん, Narita Kin, 1 August 1892 – 23 January 2000) and Gin Kanie (蟹江 ぎん, Kanie Gin, 1 August 1892 – 28 February 2001).
The twins were born on 1 August 1892, in Narumi Village (currently in Midori Ward, Nagoya), Aichi Prefecture.
[citation needed] In 1991, about to reach 100 years of age, the twins were featured in a newspaper article and received congratulations from both the mayor of Nagoya and the Aichi Prefecture governor.
13 months later, in February 2001, her younger sister Gin died at 108 years of age.
At the time of Kin's death in 2000 the twins combined had six children, 11 grandchildren, seven great-grandchildren and one great-great-grandchild.