Gen vs Jann Lee and Ryu Hayabusa
Despite her extraordinary skill in Hajinmon Ninjitsu, Ayane was no match for the wily old man.
Gen purposely held back when he finished Ayane off, not using his full strength when he executed his Zan'ei (Level 1), sending Ayane down to one knee, holding her side.
Genra then appears, having watched the battle from the shadows. It appears that both he and Gen have a past, since the former Chinese assassin and the Hajinmon boss have mutual respect for each other.
Gen praises Ayane's skills, but warns her that her overconfidence is her greatest enemy. He then leaves Japan for Hong Kong.
Several days later, Ryu Hayabusa is in the city. Following a spar with Jann Lee, the bouncer treats him to lunch at the Genhanten Restaurant.
There, Ryu senses the powerful aura of Gen, who is seated in a private booth. Jann scoffs at the possibility of an old man like Gen a powerful martial artist.
Jann's opinion then changes when the Genhanten is robbed, and Gen mauls the five robbers without breaking a sweat. Even Ryu is impressed at Gen's agility, despite his age.
Which explains how Jann challenges Gen to a 2-on-1 match. The old man accepts.
This match is hand-to-hand. Jann Lee fights first, then Ryu.