Naoya Hirata, the winner of the 2018 Japan Memory League Championship and the Japan Memory Champion, was featured on a popular Japanese TV show called Mirai Monster (Future Monsters). It shows him training on Memory League and his match in the 2018 Japan Memory League Championship finals against Anastasia Woolmer.
Check it out! 
https://www.youtube.com/watch?v=SI-riOnKuqQ
Update: unfortunately, the video is no longer available. 