Shoyu: Japanese soy sauce is a popular ramen seasoning in the Kanto region of central Japan, originally emanating from Yokohama. Traditionally it's paired with clear to brown chicken, seafood, and occasionally pork or beef-based broths, though these days shoyu is used willy-nilly by ramen chefs throughout Japan.
IM injections can be given in a large muscle in the buttock, upper arm, or thigh. It is best to use the buttock or thigh instead of the arm if: the amount to inject is more than 2 ml (2 cc). (But you should never inject more than 3 ml (3 cc) in a single dose. Use 2 injections instead.)
I have only given FFP once and our hospital policy states plasma may be administered rapidly (approximately 300 mL in 15 to 30 minutes)...so you were right in doing that. I had administered 4 units..and 1 unit per bag. Our bags will state on label that it is 1 unit.