Page 219:

"Should he still be alive, Keinosuke joins the battle against the oni, eager to redeem himself after his involvement with Michiru, the mahō-tsukai. The first time Tomonatsu or one of the PCs suffers a critical strike of severity 8 or higher, he intercepts the blow and suffers it instead, allowing him to regain his honor (albeit possibly in death). Aftermath"

I assume 'aftermath' should be the next section header.