Meaning
鱒の介 (ますのすけ, Masunosuke) is Chinook salmon, a Japanese food (water animals).
What is Chinook salmon?
The Chinook salmon ( Oncorhynchus tshawytscha ) is the largest species in the Pacific salmon genus Oncorhynchus . The common name refers to the Chinookan peoples. Other vernacular names for the species include king salmon, Quinnat salmon, spring salmon, chrome hog, and Tyee salmon. The scientific species name is based on the Russian common name chavycha .