Artist's commentary
The restaurant's name is read "Azumaya". It's normally read "toncha", a term for the east player or dealer in mah jongg.
Naturally, I wrote we were all excited, but in the Yuyu-sama style, you mustn't skip breakfast either! :-)
For tracking the soba you've eaten, there's a course where you count the bowls you stack up and a course where you count marbles. The marble-counting course is cheaper, but stacking up bowls is exactly what you think of wanko soba being, after all, so I went with the more expensive option!