Benimaru Die-Cut Keychain from That Time I Got Reincarnated as a Slime — Kodansha Official Licensed Merchandise
What This Item Is
This is an officially licensed die-cut keychain featuring Benimaru, one of the most prominent characters from the anime and manga series That Time I Got Reincarnated as a Slime (known in Japan as Tensei shitara Slime Datta Ken, or “TenSura” for short). The keychain is shaped to follow Benimaru’s silhouette — a format Japanese collectors call a daikaatto (die-cut) design — with his full-body illustration printed on a flexible synthetic leather or PVC-type surface and finished with white stitching along the edges. A silver split ring and lobster clasp handle the attachment, secured to an orange strap with a metal rivet. A paper hang tag printed with the Japanese series title is included. The Kodansha Official designation on the listing confirms this is a genuine licensed product, not a third-party or unofficial reproduction.
The Franchise and the Character Behind the Design
That Time I Got Reincarnated as a Slime began as a web novel by Fuse, serialized on the Japanese fiction platform Shosetsuka ni Naro from 2013 onward. A manga adaptation illustrated by Taiki Kawakami launched in Kodansha’s Monthly Shonen Sirius in 2015 — and it is this manga publishing relationship that makes Kodansha the licensor for merchandise like this keychain. The TV anime, produced by 8Bit, ran across two cours in 2018–2019 and a second season in 2021, followed by a theatrical film in 2022 and a third television season in 2024. The series falls into the isekai (parallel-world reincarnation) genre: a modern Japanese office worker dies and is reborn in a fantasy world as a slime, gradually building an entire nation.
Benimaru — written with characters meaning “crimson” and “circle” — holds the in-world title of Flame Lord and serves as the de facto military commander of the protagonist Rimuru’s nation, Jura Tempest Federation. He belongs to the Ogre clan and carries the visual hallmarks of a Japanese-fantasy fusion design: red skin, a horn on his forehead, spiky black hair, a predominantly red-and-white Japanese-style garment, and a katana. His character is written as fiercely loyal, direct, and formidable in combat, and he appears prominently in many of the series’ major action sequences.
Why TenSura Merchandise Appeals to International Collectors
Die-cut synthetic leather keychains are a well-established format in Japan’s anime merchandise market, sold alongside acrylic keychains as a staple of character goods. They turn up at dedicated anime retail chains, official event booths at conventions such as Anime Japan, and publisher-affiliated goods lines — making them largely domestic in their original distribution. That limited accessibility outside Japan is part of why international fans seek them through importers and marketplaces.
TenSura itself consistently ranks among the most recognized isekai properties in English-speaking fan communities, with a strong presence on platforms such as Crunchyroll, Reddit, and MyAnimeList. Benimaru in particular resonates with overseas audiences as “Benimaru,” appreciated for a design that blends feudal Japanese aesthetics with high-fantasy action. For fans of the series, a Kodansha-licensed piece offers a connection to the official manga lineage of the franchise — distinct from the unlicensed goods that also circulate in collector communities.
Price: $15.29 | View on eBay
