In this interview, japanese director Kore-Eda talked a little about his next project;
I’m planning to shoot a film in summer with children, maybe five or six children. The story will be that a new bullet train will come to their town for the first time. They will go and see it that’s all I have no. I haven’t written the script yet. Once I cast the children, then I will get more ideas from them. Once again it’s an interactive process.
Wait & see?