Kyuden Voltex confirmed that Vunilagi fell critically ill after training on Monday, 3 August 2026, and was rushed to hospital immediately. In an official statement, Kyuden Voltex said Vunilagi exhibited symptoms consistent with severe heatstroke shortly after the session ended and was transported to a medical facility without delay. A player who had just arrivedVunilagi had joined Kyuden Voltex only the previous month, having previously played in the top tier of Japan Rugby League One with Tokyo Sungoliath. Despite his brief time at the club, Kyuden Voltex said he had already left a strong impression. Kyuden Voltex has appealed to the public to respect the privacy of Vunilagi's family as they grieve their loss.