What do you mean you can't find? It has just started lol it's chapter 172.
If you mean where Tora gets summoned then that would be way back in chapter 61. If you mean Tora's 1st shows up it's the last page of chapter 44.
If you want Wu's 1st time showing up, that would be close to the beginning at chapter 9 along with Hao.
Chapter 43
Chapter 61- flashback. When they meet the first time
Can someone say when does Yakuza and Wu story starts,I wanna read it but can't found when it starts?