On the live day's morning, many fans noticed the typo on the banner. Indeed, it was written "Nippon Dudokan", however it was fixed by staff members shortly after.
Airi joked about it on her official Twitter and also during a MC of the concert, saying it was a reference to her bad articulation.
|Typo on the banner (from Airi's Twitter)|
|Screenshot from the video|
As a surprise announcement, her Autumn live tour was announced at the end of the live.