Definitely try 'The Wind-up Bird Chronicle', I think it is regarded as one of his best works although it is a bit slower paced.
For me 'Kafka on the Shore' contained a bit too many magical events that were then left unexplained and unexplored- but I didn't think it was bad at all.
The other novel I really liked was the 1Q84 trilogy.
I would start with Wild Sheep Chase (an unusual quest/adventure story) or Hard Boiled Wonderland (a bit of Lovecraft meets P.K. Dick). Wind-up Bird is slower, a bit graphic and less fun.
For me 'Kafka on the Shore' contained a bit too many magical events that were then left unexplained and unexplored- but I didn't think it was bad at all.
The other novel I really liked was the 1Q84 trilogy.