Video Showcasing 'Parasitic Worm Pen' from Japan Goes Viral On X

Japanese Parasitic Worm Pen refers to a viral video that circulated on X / Twitter in April 2026. The video, which purports to showcase a Japanese pen containing a real parasitic worm living in herbal oil (for an undisclosed reason), spread across the platform as users drew comparisons to the fictional Umbrella Corporation from the Resident Evil survival horror video game series and media franchise.