Tanakia lanceolata is a temperate freshwater ray-finned fish belonging to the family Acheilognathidae, the bitterlings. It originates in inland waterways in China, Japan and the Korean peninsula. It was originally described as Capoeta lanceolata by Temminck & Schlegel in 1846, and has also been referred to as Acheilognathus lanceolata and Acheilognathus lanceolatus in scientific publications. Its Korean name is 납자루, and in Japanese is known as ヤリタナゴ