Okayama Castle
noun
This is the same 岡山 that you learned with 岡山県. So what's Okayama castle? Yep, Okayama Castle!
おかやまじょう
When 城 is added to a place name like this, it takes the on'yomi. You haven't learned this yet, so here's a mnemonic to help you: The lord of Okayama Castle is none other than Joe (じょう), your local farmhand friend. How a farmhand like Joe managed to become the lord of a Japanese castle is beyond even us, but it's Lord Joe to you now.
岡山城のライトアップ、めっちゃきれいだったよ!
The night illumination of Okayama Castle was so beautiful!
日曜日、リニューアルした岡山城に行ってきました。
On Sunday, I visited the renovated Okayama Castle.
天気が良ければ、ここからも岡山城がはっきり見えるんですよ。
If the weather is good, Okayama Castle will be clearly visible from here.