For most tourists, traveling around Ishikawa will not be a problem. Kanazawa, the single most important destination for tourists is located nearby the Komatsu airport, and is easily reachable by bus or train.
By bus
This is another option for traveling within Ishikawa. A large number of buses leave from the Kanazawa Station to go to various destinations in Ishikawa. This makes travel particularly convenient within Ishikawa. There are also inter-city bus systems, which allow you to travel from one town to another nearby town. You take a ticket when you get on and pay when you get off. Depending on the city, it may even have its own inner-city bus system or bus system aimed at tourists.
By car
Car rentals are available at a variety of locations. If you're coming into Ishikawa by other means, you can rent cars easily in downtown Kanazawa, by the train station. However, be aware that there are tolls on the roads in Japan, and parking can sometimes be a problem.
By train
Travelling by train in Ishikawa is not a problem. There are local trains which go to a number of destinations in Ishikawa for a small cost. Once you're in Ishikawa, the easiest way to find out where to go is to head over to the Kanazawa Train Station where you can see the costs to go to a number of cities.
By bike
Biking is an option if you will only be traveling between one or two cities, but unless you're a serious biker, you won't be able to do much serious traveling on a bike. Ishikawa is a long prefecture, and it has distinctive seasons.