To be frankly it's not easy to find skaters with the same star quality as Yuzuru. He might be not their only option but without him I doubt that they can fill the arena Like they are doing now. NHk tickets were sold out within 3 minutes. CoC during Yuzuru's FS and Kiss&Cry moment obtained 31,8% rating in Japan TV, even higher than World at Saitama.
I don't dismiss other young skaters' talents from Japan. But Yuzuru is very unique when it comes to star quality. To be fair I don't think Japan fans care much about medals in the next Olympic, you know. They will just support their skaters no matter what. Mao is a huge idol in Japan, but she didn't land on World podium every year. In 2012 it's Akiko who won the medal at Worlds, yet Mao has been still the bigger figure. Many Japanese FS fans love Jeremy Abbot despite his poor performances at world stage. Attraction is very difficult to explain.
Anyways, It's not that easy for Yuzuru or any other Japanese skater to medal at the next Olympic despite how talented/ hard working they might be. It's not possible to tell how he will do when it's needed. But even if he just does well or even very well, it's still not guaranteed for him at all. Don't forget it is going to be in Korea. We all know nationalism might do a lot in those occasions.
I am not that delusional to believe that he will win the next Olympic no matter what. But being an Olympian twice is his dream and I hope JSF don't take him fro granted. He needs to be at the next Olympic because that's his dream.