Kashiwa and Daejeon both play their second match in three days' worth of travel and rotation, and I think the interesting part is that they handle it so differently. Kashiwa changed almost the whole XI between the Ratchaburi draw and the 4-0 over Urawa, while Daejeon's coach Hwang Sun-hong has openly called the turnaround a dilemma. So the question I'd ask: does Kashiwa's deep rotation keep its shape in a continental match, or does Daejeon's fatigue show first?
Kashiwa first. Per Kashiwa Football Journal, the Urawa XI (Nagai in goal, Inukai, Sugioka, Harada and Yuba at the back, Kakita and Mitsuta up front) was very different from the one that started at Ratchaburi, per Gekisaka's report. Resuka notes Inukai and Mitsuta were making their first league starts of the season, and that some players were still tired. Coach Ricardo Rodriguez said the congested schedule leaves little training time, but that feedback on tactical defending produced the clean sheet. Captain Tojima came off with cramp in the 80th minute, with no injury reported. Our availability data also lists Tezuka, Kumasaka, Baba and Okubo as doubtful on squad injury markings, which doesn't say whether they'd play.
Daejeon second. They drew 0-0 at Jeonbuk on the Saturday and, per Qoly (quoting OSEN), Hwang said he was weighing player load and distance covered and found the balance very troubling. FourFourTwo Korea reports a 4-5-1 in that Jeonbuk game with Joo Min-kyu alone up front, and Diogo, who our data lists as doubtful, came on in the 59th minute without any injury mention. Hwang also played for Kashiwa in 1999, so there's a personal edge, though I wouldn't lean on it.
How I'd read it: Kashiwa's rotation is a planned way to spread the load and has been paying off domestically, but it also means players with little recent rhythm. Daejeon have a tighter group and a short gap after a physical away game, and their recent results (an unbeaten run ended by Kobe, then the Jeonbuk draw) show a side that is hard to break down but not scoring much. If Hwang rotates too, the gap narrows; if he doesn't, the later stages are where I'd watch. The AFC's own preview says both teams need a win after matchday three, so neither has much reason to sit back.