noun
sliced kamaboko with wasabi
A dish of sliced kamaboko (fish cake) served with grated wasabi, often as a side dish or snack with drinks.
See also: かまぼこ
居酒屋で板わさを注文した。
I ordered itawasa at the izakaya.
板わさは日本酒によく合う。
Itawasa goes well with sake.
Kamaboko is the fish cake itself; 板わさ is a dish made from sliced kamaboko served with wasabi.
From 板 (ita, 'board', referring to the wooden board kamaboko is shaped on) and わさ (wasa, short for わさび, 'wasabi').