Here is little history of daigaku-imo. Accordingto the Japanese Wikipedia, one story says that once upon a time, there was theconfectionary store in front of Tokyo University, selling fukashi-imo, steamedsweet potatoes. In Taisyo Era, 100 years ago from today, students at Tokyo Universitywere such a big fan of daigaku-imo that was affordable and perfect for hungrystudents. By the way, daigaku means university and imo is sweet potato.
The anotherstory says that Waseda University also claimed that their students were theones that made daigaku-imo popular. No concrete evidence remained to provewhich university was the birthplace of daigaku-imo. *Daigaku-Imo(for 2-3)*Benefitsfor: constipation, loss of appetite,filling yang qi (positive energy) 2 sweet potatoes (medium size)
1 tablespoon sesame oil or olive oil
4 tablespoons water
2 tablespoons sugar
1/2 tablespoon soy sauce (optional, not added here)