Statistics Korea's 2025 figures, and a mood that travels with memory

Korea is among the countries aging fastest and the change is not only a matter of counts. It is a matter of how later life feels. The account was written with a 2024 Statistics Korea share of 19.2 percent aged 65 and over, and with a forecast that the share would pass 20 percent in 2025, heading toward 30 percent in 2036 and more than 40 percent in 2050. Those 2024 figures and that near-term forecast should not be read as this year's official count. Official 2025 figures are now in. Statistics Korea's 2025 Elderly Statistics, published on 29 September 2025, put the number of people aged 65 and over at 10.514 million, or 20.3 percent of the population, the first time that annual series had gone above 20 percent. The later shares of 30 percent in 2036 and more than 40 percent in 2050 remain projections in that same 2025 release.

In later life bodies and social roles decline, and so does cognition, slowly. People lose a sense of control, and low mood becomes more common. Mild cognitive impairment sits between ordinary aging and dementia: some damage to memory or attention, not yet a dementia diagnosis, with daily life still largely independent. Even so, slipping memory and thinner attention often take confidence with them, and social life shrinks. about one in three people with MCI experience depression — a share left as a reported figure, not a later official rate. Depression can raise the risk of further cognitive decline and hurry a path toward dementia, which is why leaving the mood untreated is not a small choice.

A non-drug path, and the studies the account actually sits with

Treatment meant to slow the cognitive slide is usually divided into drugs and everything else. The drug most often named is donepezil, which raises acetylcholine. It can bring vomiting, diarrhea, dizziness, and stomach trouble, and in rare cases a life-threatening neuroleptic malignant syndrome. Safer, more sustainable alternatives have turned toward physical activity, which can improve blood flow in the brain, encourage messenger chemicals, and support new cells in the hippocampus, and which also appears to steady mood. Untreated depression can damage executive function in the frontal lobes, memory, attention, and the ability to regulate feeling.

Then sits with earlier studies rather than inventing a trial of its own Implicit-memory stimulation — a way of reaching memory that does not ask the person to recall on purpose — is the path it wants to open, as a possible way to ease depression without leaning only on a pill.

Sources

1. easing depression in older adults with mild cognitive impairment through implicit-memory stimulation, read beside Statistics Korea's 2025 Elderly Statistics (published 29 September 2025).

Last updated: 14 November 2026