Here is the author Deborah Install's statement about the singer involvement in the project:
I’m especially looking forward to seeing Kazunari Ninomiya, who portrayed Saigo in Letters From Iwo Jima, play the role of Ken. With his sensitivity and sense of humour, I think he is the perfect person to portray Ken.
Here is Kazunari Niomiya's statement about the project:
Personally, it is an impressive film, which I tried very hard to follow the director’s direction. I hope you will look forward to the release.
The film will be release in Japan in 2022.
Here is the goodreads synopsis of A Robot In the Garden:
Warm-hearted fable of a stay-at-home husband who learns an important lesson in life when an unusual creature enters his life.
With all the charm and humour of THE ROSIE PROJECT and ABOUT A BOY mingled with the heart-swelling warmth of PADDINGTON BEAR MOVIE.
A story of the greatest friendship ever assembled.
Ben Chambers wakes up to find something rusty and lost underneath the willow tree in his garden. Refusing to throw it on the skip as his wife Amy advises, he takes it home.
Source material: Yahoo.com