Tashirojima
proper noun
A rice paddy is used as a substitute for an island. Which island is it? That's right, Tashirojima. Imagine a rice paddy in the middle of the sea, standing in for Tashiro Island
たしろじま
This is a place name and it uses the kun'yomi. You haven't learned this particular kun'yomi for 代 yet, so here's a mnemonic to help you remember it: When you go to Tashirojima, make sure you visit the old woman. You know what woman I'm talking about, the one who starred on Murder she wrote (しろ). She writes a lot about cats now, I guess.
田代島の人口は百人以下です。
The population of Tashirojima is less than one hundred.
田代島にはガソリンスタンドがありません。
There are no gas stations on Tashirojima.
田代島にはネコがたくさんいます。
There are many cats on Tashirojima Island.