The expansive Kanazawa Castle Park is free to enter! Within the park, you'll find reconstructed turrets and gates, allowing you to catch a glimpse of the splendor of the Kaga million-koku era.
Please note that during winter, the park hours are shorter, from 8:00 AM to 5:00 PM. Also, the park is illuminated, especially on weekends, and you can enjoy the park until 9:00 PM.
You can also see it at Ninomaru Square.
It's fenced off, which suggests that buildings will be reconstructed here as well.