Garbage Bag
Garbage Sack, Rubbish Bag, Trash Bag
noun
A garbage (ゴミ) sack is a garbage sack or garbage bag.
The word for sack (ふくろ) is rendaku'd, so be careful of that.
駅員さんに、電車に自転車を持ち込む場合は、持ち運び用の袋の使用が義務づけられているって言われたんだけど、代わりにゴミ袋を使っちゃだめなのかなぁ。
The train station staff told me that I’m required to use a carrying case in order to take a bicycle onto the train, but I’m wondering if I could use a garbage bag for it.