Despite shooting it several times with the Diendriver, Daiki does no apparent damage to Tsukasa's Rider Booker.
The card holder used by Kamen Rider Diend is identical to the holder used by Kamen Rider Zeronos in Kamen Rider Den-O, save for the addition of the Diend logo.
Despite being attacked by the Paradoxa Undead, Yuusuke makes no attempt to transform into Kamen Rider Kuuga.
Despite seeing Kivahla talking to Narutaki in the previous episode, Natsumi has for some reason apparently said nothing of this to Tsukasa and the others.
Reiko is supposedly stabbed with a fork, but no one notices that there is no blood on it.
Although Kamen Rider Ryuki watched Tsukasa and Natsumi from the mirror world in Episode 1, he doesn't seem to recognize them when they arrive on Ryuki World. It is possible that the first Ryuki is the one from Decade's/Our World (the one from Kamen Rider Ryuki), a seperate person to the one they later meet in this episode.
When he transforms into Kamen Rider Kiva, Wataru becomes adult sized, although the actual change from child height to adult height is never shown.
During the IXAcise routine, a cartoon cardboard cut-out of Nago can be seen in the background. The numbers on its shirt, 753, spell Nago's name when spoken aloud in Japanese; "Na(na)" (7), "Go" (5), "San" (3) makes "Nago-san".
Megumi and Nago's marriage is the first in the Kamen Rider series and the fourth tokusatsu series marriage after Super Sentai's Choujin Sentai Jetman, Mahou Sentai MagiRanger and Chouseishin Series' Chouseishin GranSazer.
Wataru is able to trap Kivat-bat under a bowl, yet Kivat had been able to lift that same bowl even when it was full of water.
No explanation is given for Castle Doran's late appearance for the battle or the manner in which it arrived.
Deneb says that by using Kintaros' fur to clean DenLiner's windows, he can even reach the high ones, but DenLiner only has one row of windows.
Hana says that Kotaro can't transform without Teddy, yet his earlier transformation on DenLiner didn't involve Teddy at all; he used the belt and pass as Den-O has always done, with Teddy becoming his weapon afterwards.
During Climax Form's battle with the Ghost Imagin, the DenGasher Sword Mode appeared to glow green, even though Deneb was not part of the Climax Form grouping (although he was present to witness the fight).
DenLiner is apparently unable to move without DenBird in the cockpit, but it has never been affected before.
Unusually, Kintaros says "Dynamic Chop" before performing the attack. Normally, he says it afterwards.
According to Hana, the Fangire have only recently appeared, presumably just after the defeat of the Imagin at the end of Den-O. However, in Kiva, the Fangire are shown to have been active for at least 22 years.
It is unclear what difference fermenting underground would have on varnish that was sealed inside a glass jar.
Apparently Urataros can drive; he is seen getting out of the driver's door of the DenLiner Police van. When he learnt or whether he actually has a license is not mentioned, although as the existence of Police DenLiner appears to be public knowledge, he may not have had any problems.
This is not the first time that Owner has had a Rider Pass taken from him. In Kamen Rider Den-O: I'm Born!, Gaoh took his Master Pass when DenLiner was hijacked.