Hundreds of people suffering from dementia who went missing in Japan last year have still not been found, the country's National Police Agency has announced.

The Telegraph notes that a record 17,479 Japanese suffering from dementia went missing in 2019, and that 245 of them are still unaccounted for. Most of the elderly who go missing are found within a week, but four of the missing people were found more than two years later, and several hundreds are found dead, mostly from traffic accidents.

More than 28% of Japan's population are over 65, and the figure is set to rise to 35% within the next 20 years, with estimates that around five percent of the population will be suffering from dementia within the next decade.