Japanese Birch, Birch
What kind of tree is spicy? A Japanese birch, or birch, obviously. There's nothing spicier than a Japanese birch!
Imagine licking the trunk of a Japanese birch tree and feeling the heat on your tongue.
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あずさ
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You can only cut down a Japanese birch using a zoo saw (あずさ) because a regular saw can't handle how spicy these trees are.
Imagine using a zoo saw to cut down a Japanese birch tree. What's a zoo saw? It's a saw that's used in zoos, to build all the animal enclosures. And to cut down spicy trees.