It's not just his chains, even his 6C and Venom Sword activate it.
In other words it's the biggest troll in history against the biggest troll in history.
Hazama's Astral doesn't though, I guess that's something.
If you ever wanna mega troll a Hazama trying to AH you, use 6C on it. You'll make a Fumajin right on Hazama that he's forced to get hit by when his Astral is done.
Also random fun fact, being directly above Hazama making a Fumajin on his Astral will not save you from it.