As to inquiry by OP, “Morning Set” (モーニングセット) is generic term used in Japanese restaurants and contents can vary widely from restaurant to restaurant. If you are under the impression that content of “Morning Set” is same anywhere you go in Japan, then that is not the case.

For example, morning set at Hilton Tokyo ranges from 1682 yen to 3364 yen with content to fill stomach of large Western people, some contents are European items and other are Japanese items.

At popular Japanese donut chain shop, Mr. Donut, morning set is simple a cup of drink of your choice, one donut, and a small cup of soup. The price is 480 yen.

Also, do not expect there is “Morning Set” every place open in the morning. For example, Starbucks in Japan does not have “Morning Set.”