C532 If I Were You I Wouldn't be so Stupid
If Wang Fann were to kill Kawashima Tarou, he would also kill the next Patriarch of the Kawashima. This was unforgivable both to Kawashima Family and to the Yamata Society, even to the extent that all the superpowers of the island would view Wang Fann as their enemy.
Killing Kawashima Tarou meant slapping Kawashima Family's face, slapping Yamata Society's face