Diablo Will Shame You About Snacks
The standout item from the That Time I Got Reincarnated as a Slime POP UP SHOP isn't an acrylic stand or a tote bag — it's a body composition scale that roasts you.
Manufactured by Tanita, the scale features newly recorded lines from Miho Okasaki (Rimuru) and Takahiro Sakurai (Giyu Tomioka in Demon Slayer, Reigen in Mob Psycho 100) as Diablo. Step on it and Rimuru might hit you with encouragement: "Seriously?! You're awesome! Your muscle mass and basal metabolism are perfectly healthy!" Or Diablo might deliver a politely devastating verdict: "Good grief, troubling Lord Rimuru like this... I recommend cutting back on snacks starting tomorrow."
The scale is a limited made-to-order item with an original design featuring both characters. Orders close May 31, 2026 at 23:59 JST, so the window is tight.
The Full Merch Lineup
The body scale leads a broader aftermarket drop from the TenSura POP UP SHOP that originally ran at Shibuya Hikarie ShinQs in Tokyo. All items are now available through Cocoani, an anime-focused e-commerce platform.
Beyond the scale, the lineup includes acrylic stands, acrylic coasters, magnets, T-shirts, and tote bags — a mix of collector-oriented pieces and everyday-use goods. Orders also come with a bonus: one exclusive postcard for every 3,000 yen (tax included) spent per transaction.
Why This Matters for TenSura Fans
That Time I Got Reincarnated as a Slime is deep into its Season 4 run, which kicked off April 3, 2026 and is planned for two consecutive cours. The franchise's momentum shows no signs of slowing — related publications across novels, manga, and spinoffs have surpassed 56 million copies worldwide, anchored by Fuse's original web novel that crossed 1 billion page views on the Shousetsuka ni Narou platform. The manga adaptation by Yasuki Kawakami runs in Kodansha's Sirius Comics.
The POP UP SHOP merch wave sits alongside a busy stretch for TenSura collaborations, including recent tie-ups with Kotodaman and a kimono-themed GEO exclusive goods line.
Looking Ahead
The Tanita body composition scale order window closes May 31, 2026 — that's just two days from now for anyone reading this at publication. The remaining merch on Cocoani doesn't appear to have the same hard deadline, but limited-run anime goods tend to sell through quickly.
Season 4 continues airing on Japanese broadcast, with Crunchyroll streaming the series internationally. The source manga is published in English by Yen Press, and the light novels are also available in English through the same publisher. For fans who missed the physical POP UP SHOP in Shibuya, this online drop is the last chance to grab the exclusive goods — especially that scale, which is genuinely one of the more creative anime merch concepts in recent memory.