Himeji castle

Himeji castle is one of the biggest in Japan and still preserved in its original form from centuries ago. When I saw a photo of it in my guidebook, I was a bit confused. A castle? After that I had the following conversation with my friend from the lab.

I: "Why do they call it a castle, it doesn't look like a castle."

He: "Yes, it does."

I: "No, it doesn't."

He: "Yes, it does."

I: "No, it... OK, I get it now. That's how castles are supposed to look like in Japan."