The castle itself is beautiful and I have to say, it was well worth the trip. Of all the castle in Japan, this one offers the most building to visit and possibly the biggest ground space. The inside of the main tower is a museum about the history of the castle but also about all the other castles in Japan.
As you first enter, you also see walls covered with name plates. Those name plates are the one of the people who donated money for the reconstruction of the different building of the castle.
It took Marie and I about 3 hours to visit the castle and its surrounding. Of which, 1 hour was spent trying to locate on the name plates, Murayama Ryuhei and Murakami Shingo. We did find Maruyama's plate but had to give up on finding Hina's. But as we recall, even in the documentary they had trouble locating Hina's plate.
Overall, we had a great day in Kumamoto. It's too bad the weather was rainy and gray, it prevented me from taking beautiful pictures.(On the picture, my finger is pointing at Maruyama's plate but you can hardly see it since it was so high over head.)