He's bitten and scratched 23 women on a two-day rampage in the town of Shimosuwa, which is near the capital, Tokyo.
Now schoolgirls are being told to travel in groups or be
escorted by their parents to school.
And police are doing overtime patrolling school grounds.
On the run
Police turned out with cages and tranquiliser guns in a bid to capture the macaque monkey, but so far they've failed to locate the creature.