Episode 1:

(Minor correction to a note in episode 1, but the hand also appears in ep2 at 13:40):

JUN CHAN - A hand composed of only 1's and 9's, but straights of 1-2-3 or 7-8-9 are allowed.

19:31 - A rep player is either a replacement player or a representative player.

Episode 2:

9:15 Note correction: Since they are going by a Han Chan per session, there are two rounds per session, not four. Meaning the East Round comes first, then the South Round. So there are at least 8 games per session.