I just wondering about the reason nodoka said in this picture:
It's said that Saki has colorful past about mahjong with her sister that make her want to go to Nationals.
And here Saki said that "Haramura-san too?"
Which that i Interpret as Nodoka also has a past with someone that involve with National.
Nodoka parent are police Investigator and lawyer (i think they are no involve in Mahjong).
Nodoka learn Mahjong in hospital with old folk.
So, by "Haramura colorful past" i mean that the lost friends Achiga.
Conclusion:
Nodoka went to Nationals to publicity her existence to her Achiga friend that even though they are live apart, they still can met at nationals. And the Achiga answer her calling to National.
In the last scene in Achiga episode 10, I think nodoca will come too the tournament and met her friends.
And Achiga will lose in semifinal but still can met with Nodoca (I can't think that Achiga powerful enough to become runner-up and beat Senriyama (Shiratodai the first)).