The grades of American islands and cattle are mainly divided according to the comprehensive score of beef fat content and marbling distribution, and there are three different grades of product series:

1. See Shimashima Boutique (BMS8-9).

2. See Shimashima 5 Star (BMS6-7).

3. See Shimashima 4 Star (BMS4-5).

Generally speaking, the classification of American islands and cattle mainly focuses on fat content and marbling distribution, and different grades of product series have different scoring ranges.