Japan is made up of many islands, but there are four main islands. The largest one is called Honshu. Tokyo, Osaka, Kyoto, Kobe.... are all on Honshu. I'm on Honshu right now. Kushimoto city in Wakayama pref. Is the most southern point in Honshu. Of course there's an omiyage shop there too.
I got this certificate saying verifying my visit to the most southern point of Honshu at the omiyage shop. I'm a sucker for stuff like this.
This is what the coast looks like. I thought it kind of looks like Laguna Beach.
大きな地図で見る
Here's a map.