Meaning
山かけ蕎麦 (やまかけそば, Yamakake-soba) is Yamakake soba — a Japanese food.
What is Yamakake soba?
Yamakake-soba (山かけ蕎麦) is also known as tororo-soba (とろろ蕎麦). It consists of soba noodes topped with tororo , the puree of yamaimo ( Dioscorea japonica ), a potato-like vegetable.