Yes, you read it right, the live action movie of Kingdom was announced on 21 December 2017 on Weekly Bunshun, a Japanese Magazine. Screenshot of the news article on Weekly Bunshun below:
As far as we know, there isn’t much news on the live action movie other than Shin is played by Kento Yamazaki, who also played Shin in the 3 minute live action short celebrating Kingdom’s 10th anniversary last year, which was filmed in Hengdian World Studios in China, a place where many Chinese historical films are filmed at. Kento Yamazaki is also best known for his role as “L” in Death Note.
As we do not know anything else about the movie, let’s assume that the cast and crew is the same as the ones used in the 10th anniversary short, Kyokai’s actor would be Chihiro Yamamoto and Houken’s actor would be Kenji Gojo. Sei would be played by a Chinese actor as seen in this tieba post and the crew would be both Japanese and Chinese. The setting, hopefully, is set at the battle of Sai just like the setting in the short video so we don’t have to go through the first arc which contains little to no battles or wars.
Let’s hope the is good and not as disappointing as many recent live action adaptations of mangas. There are many high quality Chinese war movies such as Red Cliff and Hero and lett’s hope that Kingdom’s quality matches those.
I will update this post as we get more details about the movie in the future.