Meaning
笹身 (ささみ, sasami) is Chicken breast, a Japanese food (meats).
What is Chicken breast?
Sasami yakitori uses a cut of meat comes from either side of the breast bone. It is naturally low in fat and has a very mild flavor. Some yakitori restaurants will serve sasami with wasabi and shiso for a flavor that is described as sappari , or clean and refreshing. Tare would be a good option for those who prefer bolder flavors. The yakitori pictured here is flavored with salt. This word often is written entirely in hiragana (ささみ).