Tatami bored me, the scenario was clever but the MC annoyed me to no end. And the ending final episode didn't really impress me. It's a well made show all around, I can't ignore that, but I honestly didn't connect or care about it at all.
Ping pong was pretty good but didn't have enough focus on the actual game for my taste. There's too much 'reaction faces' of people reacting to what is being played and hitting the ball with a determined look. China didn't have enough focus and was pretty much wasted, but it's fine since Pico beat all the top players in that final tournament, so it's excusable. That ending song at the end was perfect though.
https://www.youtube.com/watch?v=jDeca52TDZEIt really didn't have to show the old people in their prime for a half second but it was beautiful.