日本鳗鲡（学名：Anguilla japonica，俗名白鳝、青鳝、鳗鱼、白鳗）为辐鳍鱼纲鳗鲡目鳗鲡亚目鳗鲡科的其中一种鱼类。

本鱼分布于马来半岛、朝鲜及日本、中国沿海、四川境内的长江干流、金沙江、岷江、涪江、嘉陵江、沱江、渠江等水系以及菲律宾群岛等地的淡水溪流中。该物种的模式产地在日本长崎。

The Japanese eel (Anguilla japonica; Japanese: 日本鳗 nihon'unagi) is a species of anguillid eel found in Japan, Korea, China, ******, and Vietnam, as well as the northern Philippines. Like all the eels of the genus Anguilla and the family Anguillidae, it is catadromous, meaning it spawns in the sea but lives parts of its life in freshwater. The spawning area of this species is in the North Equatorial Current in the western North Pacific to the west of the Mariana Islands. The larvae are called leptocephali and are carried westward by the North Equatorial Current and then northward by the Kuroshio Current to East Asia, where they live in rivers, lakes, and estuaries. The Japanese eel is an important food fish in East Asia, where it is raised in aquaculture ponds in most countries in the region. In Japan, where they are called unagi, they are an important part of the food culture, with many restaurants serving grilled eel, which is called kabayaki. Eels also have uses in Chinese medicine.