Leuciscus hakonensis, Günther 1877 Leuciscus hakuensis, Günther 1877 Tribolodon punctatum, Sauvage 1883 Tribolodon hakonensis, (Günther, 1877) The big-scaled redfin (Pseudaspius hakonensis), also known as the Japanese dace[2] and ugui (鯎 or 鵜喰),[3] is a medium-sized Asian fish.

[4] First described by Albert Günther in 1877 as Leuciscus hakonensis,[4] it was the type specimen of the genus Tribolodon, having been described again as Tribolodon punctatum by Henri Émile Sauvage when he established that genus in 1883.

[5] It is the most widely distributed of the Pseudaspius species, found over much of the Sea of Japan.

[6] It is known to carry a number of parasites, including the trematode species Centrocestus armatus (for which it is a second intermediate host),[7] and the copepod species Ergasilus fidiformis, which is carried in the fish's gills.

Fly fishing for dace using patterns that imitate small fry or invertebrates can be successful.