Taka I still have to double check Kakuriyo, but if it is an isekai then 2018 already has 10 so far. Well we can certainly say it's packed this year, and especially next season with 4 isekai series so far.
Ps. updated the list.
Hagure Yuusha no Aesthetica was added, as it's basically half an isekai. The MC starts in another world, but goes back to his original one in the first chapter. Well the girl he takes with her is from another world though. I might have to finish the anime to see if it was correct to add it, given i never got to finish it. Well i'd like your opinion as well for it, as it's a gray area.
Also added The Devil is a Part-Timer since it actually is an isekai.
EDIT: Remove Hagure Yuusha no Aesthetica for the time being.
Aesthetica of a Rogue Hero is weird. I remember the anime. He finished his journey, defeated the demon lord and asked to protect his daughter in the first episode. They barely covered it. He goes back to his original world. They never really go or visit other worlds.
It's like Devil is a Part Timer's situation where the isekai part is reversed.
I don't know if Miss Kobayashi's Dragon Maid is an isekai. I remember there was a dragon land but it wasn't separated because I thought it was weird how Miss Kobayashi who was drunk wound up meeting Tohru. I don't remember in the anime they shown a separate fantasy world
In Devil is a Part Timer, the first episode shows Maou and his group fighting in the fantasy world before getting sucked up in a portal into another world, a "real" world.
We counted it even though it's a reverse of what an Isekai is.
Taka , Actually It was shown throughout the anime that Tohru is going through a portal she opens to go to their world an back. And Elma cannot go back to their world because she cannot open a portal like Tohru. Also Tohru's world was shown a bit in the episode where Tohru and Kobayashi is competing who would make a better Bento for Kanna.
Thanks for double checking. I did watch the anime but my memory was bad. All I remember was family themes, yuri baiting and fan service. The lore and world building for the anime wasn't their strong point.
Taka, Haiken I doubt you can call Miss Kobayashi's Dragon Maid a true isekai though. Like Haiken said Tohru came from a portal she created herself when she fleed wounded. However unlike The Devil is a Part-Timer where Maou is practically trapped in the real world as his magical power that let him travel to another dimension are insufficient, Tohru in Dragon Maid can still freely move between the two worlds and has demonstrated it. A reverse isekai is still an isekai, as it is just an isekai in which the world they are transported from and the world they are gone to/stuck in are practically the reverse of the usual whisked to another world stories.
Having said that the line between isekai and not is pretty vague, as even the series in which the protagonist isn't stuck in the alternate world are considered isekai by the broad definition of it. But by the broad definition of an isekai a reverse isekai is also an isekai. That would leave every series where the protagonist travels to another world an isekai. I think that what one defines as the definition of an isekai is practically worth a discussion in itself.
HungryWorld, In the case of Devil is a part timer, it is shown that they can travel between their worlds whenever they like. Emi have enough holy power to do that, it's just that she is watching over the three devils. The three devils can acquire magic power whenever they like through fear, they just don't want to do it. So they are not really trapped, they just chose to stay because Maou wanted a new life. Even when they have magic power, they chose not to use it to go back. Remember the fight after they defeated Sariel, Maou actually opened a portal to ente Isla and threw Sariel there, but the portal just reacted to Maou's magic in Mgronalds so the other end opened there instead. Also, Alsiel didn't use a single Magic in the last fight, which means he should have enough magic to at least open a portal.
The Most Overpowered Character in fiction is the one in our heads
Haiken Wasn't it that Emi was stuck there but her friends could freely travel between the worlds, which is from where she is getting that drink that replenishes her powers (as in her friends gave her that didn't they)? For Maou indeed they can gather the magic power whenever they like through fear while they don't as Maou doesn't want to harm those without ill-intent towards him. So he would plan to conquer the "new" world peacefully through the most idiotic idea, choosing to stay there. It still means that they can't freely travel between the worlds without having to spread fear to get the power to do so. But you're right, it means they're not really trapped.
As for the last bit i can't even remember. I know Sariel disgusted me lol.
I guess we have to group Devil is a Part Timer, Miss Kobayashi's Dragon Maid, Aesthetica of a Rogue Hero under Reverse Isekai or Subversion of Isekai and keep it away from the other titles to minimize confusion.
That's a good idea, we need to establish a criteria.
1. The protagonist has to be trapped in a fantasy world and majority of the time is spent in the fantasy world not the real world. 2. The method of the "trapping" can be reincarnation, portal, or any other means. 3. The fantasy world must be a separate dimension or planet.
Taka , I don't think the protagonists needs to be trapped in the other world. Just that most of the anime should be spent in the fantasy world. Examples of Isekai that the MCs are not really trapped is Gate, Dog Days and Inuyasha. I would still consider those as Isekai Anime.
*Add "Dog Days", "Kyo Kara Maoh", "Inuyasha" and "Outbreak Company" They're before 2017 though *Under Reverse Isekai, "Re:Creators"