For one of the oldest app developers in the world, being a "dokkyo roujin" -- an elderly person who lives alone -- turned out to be a benefit in the long run.
원문출처 : https://www.cnn.com/2019/03/23/asia/hinadan-elderly-app-japan-intl/index.html
원문출처 : https://www.cnn.com/2019/03/23/asia/hinadan-elderly-app-japan-intl/index.html