
Questions & Answers about aonori o kakeru.
It is read あおのり.
- 青 = あお
- のり = seaweed
So the full reading is あおのり.
を marks the direct object of the verb.
Here, 青のり is the thing being put on or sprinkled, so it takes を:
- 青のりをかける = to put/sprinkle green seaweed on something
So grammatically, 青のり is the object of かける.