For additional information on this topic, see Nana bonus pages on Ai Yazawa Wiki.
Bonus Pages or Bonus Page, also sometimes referred to as Junko's Place, are located in the back of each volume of Nana. Junko Saotome hosts the bonus pages in her bar called "Junko's Place" on the seventh floor of the "Yazawa Building." The Family Times is a newspaper that is usually included along with the bonus pages. The newspaper is mysteriously delivered to Yazawa's characters at midnight.
Many of Ai Yazawa's previous characters can be found on the seven floors, such as "Noriji's Soba Spot," and "Bar Mamiya." The most famous being "Isabella Island," where Nana and Hachi are lost for numerous bonus pages.
The bonus pages are only absent in volume 20, because Ai Yazawa thought that it would be inappropriate due to the ending of the Chapter 77.Uehara.
Recent chapters reveal that Mai may actually have a secret she prefers not to reveal since the tabloids have discovered Nana's father's surname may actually be "Tsuzuki", which would imply that she, like Misato Uehara, is Nana's half-sister.