User blog comment:Xilinoc/Ch. 597 - Winded by the Shadow/@comment-493809-20140919032900/@comment-11051098-20140919222805

Yamamoto could only revive those who died by Ryûjin Jakka's flames. That said, it wouldn't be a shock if Kubo decides to make Yhwach able to actually revive anyone, regardless of how he killed them, although it would be too much IMO if he could use Zanka no Tachi to revive Yamamoto.