Japanese Restaurant Charges For Leftover Food

In Sapporo, Japan, the restaurant Hachikyo respects fish and fisherman so much that before you order their signature dish, tsukko meshi (salmon roe over rice), you have to agree to a set of rules. Like, if you have even one grain of rice leftover in your bowl, you have to donate money to a fund for the local fishermen. Why? The menu claims it's "to show our gratitude and appreciation for the food they provide..." Now, that's a serious meal!