Official anime goods maker COSPA has announced a new apparel and accessories collection based on Tensei Shitara Slime Datta Ken (That Time I Got Reincarnated as a Slime), affectionately known as Tensura, spotlighting the series’ beloved protagonist Rimuru.
About Tensura
Tensura began as a web novel by Fuse on the “Shōsetsuka ni Narō” platform and has since surpassed 56 million copies in cumulative circulation across all formats. A manga adaptation illustrated by Taiki Kawakami is also ongoing. The TV anime launched in October 2018, followed by the theatrical film Guren no Kizuna-hen in November 2022, and the three-episode OVA Corius no Yume in 2023 to mark the web novel’s 10th anniversary. In 2026, the second theatrical film Sōkai no Namida-hen opened in February, and TV anime Season 4 (split across five cours) began airing in April.
New Items from COSPA
Rimuru-sama College Plating T-Shirt
A high-performance tee that looks like a standard cotton shirt thanks to its 100% cotton outer yarn, while the inner mesh structure provides excellent breathability. It also features moisture-wicking and quick-dry properties. Available in two colours: NAVY and WHITE.
Minna no Rimuru-sama Lightweight Dry Hoodie
A lightweight hoodie perfect for casual outings. Key benefits include being light, quick-drying, and wrinkle-resistant — no ironing needed. It also offers UV protection, making it suitable for sports and outdoor activities.
Tote Bags
- Rimuru-sama College Shoulder Tote — thick canvas, approx. 40×34×13 cm, 100% cotton
- Rimuru-sama College Large Tote — sturdy fabric with large capacity, approx. 40×48×15 cm, 100% cotton
Both bags are designed for everyday use and built to last.
Raphael Icon Dry T-Shirt
Rounding out the collection is a tee featuring Raphael (智慧之王), the ultimate skill evolved from Rimuru’s unique skill “Great Sage (大賢者).” The shirt boasts quick-absorbing, fast-drying, and UV-cut performance — wear it and you might just feel like saying, “There is nothing I cannot answer.”
Release Schedule
All items will go on limited early sale at the COSPA booth during Wonder Festival 2026 [Summer] on July 26, 2026. General retail release is planned for early October.

