Leiji Matsumoto is seated at a table with a lady with long blond hair and a black hat. This is a homage to Matsumoto's heroine Maetel from his "Galaxy Express 999" saga.
Manga creator Leiji Matsumoto is fond of using the number 9 in his works. He cameos in a series titled "99.9 ~ Keiji Senmon Bengoshi."