The cat was discovered as a two week-old stray, and the local police station eventually took the feline, named "Iemon", in. And this past April, the cat joined the force.
Iemon helps with scams. In Japan, old people are often targets of "Ore-ore" fraud. "Ore" is the masculine pronoun for "I", and tricksters often call old people, pretending to be their sons and asking for large sums to money wired to them.
Iemon's role is to help the scammed elderly open up and feel more comfortable talking to officers. A cat in uniform will do that.