The word "Waidai" is a word I created when I wrote the lyrics for this song. When Moochy (J.A.K.A.M.) contacted me, he said it was about justice. Two films were sent to me, and I was very confused after watching them. It depicted a tragic world, a hopeless reality, and I wondered if there is any justice at all. I thought about justice in my own way, but I just couldn't like the word or the concept. Later he told me it's not only about justice itself, but it's also about people helping each other and the subtleties of human emotions. I then thought he was referring to something like the empowerment which exists in human activities that precedes the weighty word, justice. One of the films was a documentary on Dr. Tetsu Nakamura, and the way Nakamura gazed at the vast land in the film left a great impression on me. For me, the landscape of Waidai overlaps with the landscape he saw. I tried to express the feelings of people trying to be better, their desperation, struggle, and attitude of trying to connect even in the midst of chaos. "Wai" means small or low. There are moments when even the smallest of beings come together and become a great force. The word "Waidai" embodies such a wish and my admiration for humans.