- Anti-Climax Boss: Tokoyo no Ou/Cimmerian King, the final boss of the offline single player, has a very low health pool compared to other end game bosses and the most breakable parts of any Oni in the game, which makes chewing through that smaller health pool very easy. Additionally, while it does deal significant damage, most of its attacks are very slow and predictable, so avoiding them is very simple.
- Goddamned Bats: Any of the smaller Oni can become this if left unattended.
- Special mention goes to the small Oni Doryou, tunneling worms that headbutt you from beneath the surface, throw rocks or pull you in so they can headbutt you. There is an optional mission that requires you to kill one hundred of them in under five minutes.
- Goddamned Boss: Many, unfortunately. A lot of the large Oni suffer from being aggravating without particularly challenging.
- The Final Boss, Tokoyo no Ou/Cimmerian King is actually not very difficult (any Rank 4 weapons will do), but during the final phase of the fight he will keep charging blindly again and again and again, wiping out your AI allies who are not smart enough to get out of his way. This means that unless you can stop him in his tracks (such as by using Gold Binding/Stupor skill of Stealth Mitama), you will eventually end up with perpetually K.O.-ed allies, as they keep trying to raise each others, unaware that the Oni is literally mopping the floor with them. At this point the fight is basically unwinnable.
- Pyropteryx, especially when first encountered. It frequently hovers out of range for most melee, ignites you with most attacks and likes to repeatedly use a heavy hitting AoE attack that is all but impossible to avoid if you're already in melee range.
- Tsuchikazuki/Terragrinder will instantly regenerate all its limbs, even those that have been purified, and begins swimming through the ground when its health reaches about 50%. During this time, it becomes incredibly fast and hard to hit, as most of its body is hidden underground.
- Any boss that attacks by charging at you will inevitably have moments where it will cross the entire fairly large area you're fighting it in with its charge attack, wasting time as it runs much faster than you across an area you can't hope to cover before it does the same thing in the opposite direction.
- It's the Same, Now It Sucks!: One of the criticisms Toukiden receives is that it's just trying to cash in on the success of other games like Monster Hunter and God Eater without bringing anything new to the table.
- Fake Difficulty: Some of the later online missions, when any given attack can knock off 80% of your health, are particularly bad. Especially when you're required to fight multiple large Oni at once or several in a row, and all of them have different elemental attributes.
- Any of the missions that require you to fight a large Oni with infinitely spawning small Oni. In particularly large arenas, they can be avoided, but in smaller areas the small Oni can't be avoided and it's easy to get swarmed and stunlocked by mooks.
- Hilarious in Hindsight: One of the Mitamas in Toukiden 2 is in fact Ragna the Bloodedge. This is before it's revealed that at the end of BlazBlue: Central Fiction, Ragna Ascended to a Higher Plane of Existence, therefore it's now legit that he's a Mitama.
- Narm Charm: Sometimes, it's kind hard to take the larger-than-life mononofu and their oversized weapons seriously. The fact that some protection gear are over-the-top doesn't help. Try not to laugh when someone bring the Lawson headgear into play.
- Porting Disaster: The PC version. The frame rate is locked to 30 Frames Per Second, something that is considered a mortal sin on the platform. Any attempt to unlock the frame rate will result in the game running at double speed, complete with sped up voices and animations. The game is also a port of the PS Vita version, not the PS4 version, meaning that the games resolution is very low, and changing the resolution to anything higher can make the game cease to function.
- That One Boss: Abyssal Fiends, the stronger palette swap of Gouenma/Chthonian Fiend. Most of their attacks launch tracking shockwaves, its standard projectiles have ridiculous homing and upon enraging, it gains an extremely damaging charge attack that is nearly impossible to dodge if you're in melee range.
- Bloodhunters/Mafuchi, the beefed up version of the Manhunter/Mifuchi, the weakest large Oni in the game. The increased size of their claws makes several of their attacks considerably harder to dodge, and they gain an extremely dangerous repeated jab attack that is a guaranteed stun and is absurdly difficult to avoid. And sometimes they like to do this attack three to four times in a row...
- That One Level: The offline mission Four Horsemen, requiring you to kill four large Oni. Simple enough, but your NPC allies are separated from you and placed in random zones at the start of the mission and unable to join up with you until you go to them. The result is that you're forced to fight a Pyrogrinder and Bloodhunter in succession, possibly with only one NPC ally to assist you.
- Any of the Phase 10 online missions. The solo Oni can tear off huge chunks of your health with a single stray hit, and the missions requiring you to fight multiple large Oni have combinations of elemental types that are impossible to optimally equip for.
- The Woobie/Moe: Oh, Kikka...
- Hatsuho and Nagi qualify as well.
- Woolseyism: The Western release gave many of the Oni and weapons names that aren't accurate translations of their original Japanese names or are just completely made up. This is especially odd considering that all the human characters keep their Japanese names and all of the spoken dialogue is in Japanese.
- Tsuchikazuki, lit. "Hidden-in-soil" is dubbed "Terragrinder", Kueyama, roughly "Mountain Destroyer" is named "Jollux", Mifuchi, roughly "Abyss" is turned into "Manhunter", etc.
YMMV / Toukiden