Yuji Hayashi's project was to encode a message on Bento using Nori (toasted seaweed) and rice. He argues QR-encoded bentos will create a new communication channel between moms (who make bentos) and kids (who eat them) and describes a scenario in which a devorced mom says things like "I'll marry again" in a black and white pattern created using Nori and rice.

So, Mr. Hayashi and his mom struggled for three hours to create something like this. However, unfortunately, his mobile phone couldn't decode it. Lessons learned: Nori is deformed when it absorbs moisture from cooked rice. He thinks he should have used Kombu seaweed instead, which is more robust. He also suggests that someone should develop "Nori for the age of information technology. "