Demographic transition and population aging in Korea. 
"This paper describes the process of population aging in conjunction with the demographic transition in [South Korea].  Korea has recently experienced rapid decreases of both mortality and fertility, which have brought about the rapid process of population aging.  The speed of...population aging in Korea is projected as one of the fastest in the world.  Population aging brings about changing patterns of family composition, especially new trends of living arrangements of the elderly.  Since the process of population aging [began] in Korea, the proportion of [those] living alone and [of those] living with spouse only have significantly increased."