Japanese yam (Dioscorea species), eaten in various ways such as grated (tororo) or sliced; often written 山芋 or 山いも.
朝ごはんに山芋のとろろをかけたご飯を食べた。
I had rice topped with grated yam (tororo) for breakfast.
市場で新鮮な山芋を一本買った。
I bought a fresh yam at the market.
この料理では長芋より山芋の方が粘り気が強い。
For this dish, yam (山芋) is stickier than nagaimo.