In Japan, popular fast-food chains are under scrutiny for reportedly "disposing of substantial amounts of unsold 'Happy Sets'". The issue came to light recently when employees of these establishments revealed the practices to local media. The controversy prompts discussions about food wastage and sustainability in a country that traditionally values resourcefulness as encapsulated by their concept mottainai.

In Japan, the value placed on the ethics of mottainai (the spirit of waste not, want not) goes beyond just a simple habit but is a deeply ingrained element of the culture. As such, the revelation of large quantities of food wastage at popular eating places has sparked disappointment and anger among the public. The issue has become a topic of debate concerning corporate responsibility and the social ethics in business practices.

In contrast, in the US and EU, while food wastage is still an issue at fast-food chains, there are various programs and initiatives aimed at reducing this problem. For instance, some businesses have formed partnerships with local food banks and charitable organizations to ensure that unsold food does not go to waste.