Insurance policies covering various expenses relating to dementia are growing more common as Japanese demographics shift to an older population.

One in five Japanese age 65 or older are projected to suffer from dementia in 2025, according to estimates by the Health, Labor and Welfare Ministry.

In January, Mitsui Sumitomo Insurance Co. started selling a fire insurance product for households with a special clause to cover damages stemming from halted train operations caused by dementia patients wandering onto rail tracks.