The Year’s Top Isekai? Spoiler: It’s Not the One You’d Guess

Halfway through 2026 and the anime chatter is already buzzing about a handful of breakout series. Among them, the isekai genre—where ordinary folks get tossed into fantastical worlds—still feels a bit scarce, so every new title that lands gets a little extra spotlight.

Enter the surprise of the season: according to PR Times’ latest Ebookjapan sales ranking, the manga‑turned‑anime That Time I Got Reincarnated as a Slime clinched the top spot in the isekai category. It’s a bit of a curveball, especially when many still cling to the idea that Re:Zero – Starting Life in Another World reigns supreme.

The numbers back up the hype. The series, which first hit shelves back in 2015, had already passed the 40 million‑copy mark by early 2023. Fast‑forward to this year and Volume 31, released in February, moved more than 345,000 copies in just May alone. Those figures are what pushed it to the summit of the half‑year sales list.

For anyone unfamiliar with the story, here’s a quick refresher. Satoru Mikami, a 37‑year‑old office drone, meets his end in a traffic accident. Right before his consciousness fades, a disembodied, AI‑like voice whispers a command, and he awakens as a gelatinous slime in an unfamiliar cave. Determined to make the most of this second chance, he devours anything he can, copying both looks and powers. After a fateful encounter with a beast, he earns the name Rimuru Tempest and embarks on a quest that gradually reshapes the world around him.

What’s next for Rimuru? Season 4, the longest season yet, is set to roll out over the next couple of years with five full cours on the schedule. The spring batch wrapped up the first arc, seeing Rimuru break free from Maribel Rozzo’s scheming. But the story isn’t winding down—Maribel’s greed‑driven machinations are still lurking in the shadows, and the second part of the season is already teasing a showdown that could tip the balance of power.

The early episodes of this new half focus on a labyrinthine subplot, yet tension spikes quickly when Maribel attempts to seize control of Rimuru himself. Predictably for the hero, the plan backfires, and Rimuru emerges even stronger. The latest trailer hints at a familiar face from Rimuru’s past re‑appearing, and a mysterious descendant poised to play a pivotal role. Fans are left to wonder just how far the slime can stretch its influence.

Whether you’re a longtime follower or a newcomer curious about the hype, the data speaks volumes: That Time I Got Reincarnated as a Slime isn’t just a popular isekai—it’s become a cultural touchstone for the year. Feel free to drop your thoughts in the ComicBook forum below; the conversation is just getting started.