菊芋(キクイモ) Jerusalem artichoke

　繁殖力が強く、ほったらかしておけば、見上げるほど背が高く成長します。塊茎は食用になりますが、それほど美味しいとは思いません。食用油との相性はよいと思います。

　It has high fertility, so even if you abandon it, it will be taller as you look up while you are unaware. Its tubers are edible. I don't think they are so delicious, but I think they go well with cooking oil.