That Time I Got Reincarnated as a Slime S4 Ep 1 Review
RIMURU-SAMA, WE MISSED YOU!!! 
If you remember all my reviews of Mushoku Tensei, then you remember my concept of the Seven Summits of Isekai. They’re the series that I consider to be the pinnacle of the genre that has become so prevalent over the last decade. And while I still have a soft spot for Shield Hero and Mushoku Tensei, we here at the D&A Anime Blog are huge fans of one isekai above all others: That Time I Got Reincarnated as a Slime. It’s got an amazing world, great and lovable characters, and Rimuru might be one of the most OP, broken protagonists in all of fiction. So it is with great fanfare that we welcome back Lord Rimuru as we begin the first cours for the monumental fourth season of That Time I Got Reincarnated as a Slime!
It’s been a while since the Great Festival where the nation of Tempest made its grand debut on the world stage. And for Rimuru and his friends and allies, life couldn’t be better! His plans to build a magic-powered train system are progressing nicely. More and more humans are visiting or living in Tempest, making the idea of human- monster coexistence more of a reality. Rimuru’s beloved students are now attending class in Tempest and away from Yuuki, with Hinata serving as a guest teacher. And, as crazy as it sounds, Shion managed to make a tea he can actually drink!
Started
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That Time I Got Reincarnated as a Slime S4
My family is back and I'm so happy https://t.co/qZUlFC6Xfk pic.twitter.com/m9eXnS5YBK
(@Sayngelic) April 3, 2026
All of it adds up to Rimuru being able to enjoy a happy and fulfilling life. Except for one problem: their new Dungeon isn’t working.
The Tempest Dungeon is Like Dark Souls
Despite all the advertising and work they put into it, too many newbie adventurers keep trying to take on the Dungeon. They’re getting lost, starving, or owned by even the most basic of monsters. At this rate, the Tempest Dungeon will be a financial flop! All of this is leading adventurers to lash out at the citizens of Tempest and say their Dungeon is unfair. Something has to be done, and it’s the kind of thing that a gamer can fix. A gamer like Masayuki.
Gamers Rule
I already enjoy the fact that the world of Slime Tensura has a lot of gaming mechanics, as that serves as the basis for a lot of isekai. However, it made me so happy to see the mild-mannered hero Masayuki come up with the solutions they need. Quick-save points, loot drops from monsters, tutorial lessons and rest stops! It’s everything that goes into making a good video game, and the best games are the ones that show you how to play without holding your hand.
Rimuru and Mjöllmile take it one step further. They put out ads saying that anyone who makes it halfway through the Dungeon or beats the whole thing will win a hefty cash prize.
Their little advertising campaign works perfectly. More adventurers start pouring into Tempest, eager to get the chance to win money and fame, solving the financial problems of the Dungeon. Though I can’t but feel like they’re overlooking one crucial: what if someone actually does beat the entire Dungeon? Getting past Veldora seems too absurd to consider, but if reading shonen manga has taught me anything, there’s always going to be someone who will wind up doing the impossible. They’re gonna have to eat their words when that happens!
Poor Masayuki
— SS_Butcher (@SS_Butcher9) April 3, 2026Rimuru makes him poster boy & Main advertiser for the Tempest Dungeon
Gard & Rimuru on money grind
– That Time I Got Reincarnated as a Slime Season 4 #転スラ #tensura pic.twitter.com/HY1VVBRaTj
That issue aside, as a gamer, I applaud what they are doing with the Dungeon. As a gamer, I can tell you that having a tutorial and training courses can mean the difference between winning a game or getting owned like a scrub. That, and I like the concept altogether.
Haters Gonna Hate
It’s not all sunshine and flowers, though. Whenever someone is riding high, there’s always a pack of haters ready to take them down. And Rimuru has been dealing with plenty of haters. Falmuth, Clayman, the Seven Luminaries, and now, the Rozzo family. Introduced during the last season, they’re a secret cabal thats trying to dominate the human world from the shadows loek they’re the Templars or Illuminati. And the Jura-Tempest Federation is getting in the way of that, so they’ve been trying to take them down. So far, their plans haven’t worked, but that doesn’t make them any less of a problem. Fortunately, this is Rimuru we’re talking about; he’ll be fine.
This was a good, solid start to the long-awaited fourth season of Slime Tensura. I know not everyone is interested in the more mundane aspects of world-building and just wants to see more fights, but it’s those aspects that make the series so entertaining. A lot of isekai only do the bare bones when it comes to developing their worlds, but Slime Tensura is one of the ones that is a cut above the rest. That, and its sense of humor and fanservice are pretty good!
That Time I Got Reincarnated as a Slime Season 4 Ending
— Tensura News ENG (@tensura_updates) April 3, 2026. pic.twitter.com/VnY3VcVb7B
I give “New Days” a 3.5/5
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Thanks for reading: Great Rimuru has Returned to us!!!, Sorry, my English is bad:)