Meaning
琵琶鱒 (びわます, Biwa masu) is Biwa trout, a Japanese food (water animals).
What is Biwa trout?
The Biwa trout ( Oncorhynchus rhodurus ) is endemic to Lake Biwa in Shiga Prefecture, Japan, but also has been introduced to Lake Ashi and Lake Chūzenji. While called trout, the fish is most closely related to the masu salmon ( O. masou ). Biwa trout represents a unique food fish for the Shiga prefecture. Biwa trout and its caviar are considered a delicacy. Usual ways to prepare the trout include as sashimi , by grilling with salt, in meuniere, or by smoking, deep-frying, or simmering. The fish has a reputation as being very difficult to catch by angling.