In front of The “Owl Police Box” at Chiba Station where is located at the East Exit. After exiting the ticket gates at the East Exit, take the escalator down to the ground level and you'll see it immediately.
It takes about 15 minutes on foot from JR Chiba Station, and about 10 minutes on foot from Keisei Chiba-Chuo Station, 5 minutes walk from Yoshikawa Koen Station on the Chiba Urban Monorail.