That Time I Got Reincarnated as a Slime (2018)

That Time I Got Reincarnated as a Slime is Eight Bit's anime adaptation of Fuse's web novel series, illustrated by Mitz Vah, first airing in Japan October 2018 to March 2019, following salaryman Satoru Mikami after he is killed and reborn as the slime Rimuru Tempest in a fantasy world, where he befriends the dragon Veldora and builds the monster nation that becomes the Jura Tempest Federation. (Wikipedia) Seiko licensed a Jura Tempest Federation-branded watch sold through the PREMICO online shop in 2021.

Watches

Seiko Jura Tempest Federation Official Watch: Official product partnership, not an in-work appearance. Seiko and Imperial Enterprise released this 2,500-piece watch through PREMICO on March 24, 2021, its gradient dial evoking Rimuru's Great Sage magic circle with a sword-shaped hour/minute hand and a Rimuru-shaped seconds hand, shipped in a Rimuru-shaped box with an illustrated guarantee card. It is licensed merchandise, not a watch shown on screen. (atpress; PREMICO)

Official partnership product · Not shown in the work