Yuji Naka has confirmed that he is no longer working for Square Enix in April this year and may not be working on games again. While writing Twitter, through Google Translate, "I can't talk about the reason now, but I hope to be able to talk about it when the time comes. As for future activities, I'm 55 and so I can retire."
Yuji Naka came up with the prototype for a smooth scrolling platform that became the original Sonic the Hedgehog, which he programmed in 1991. As a programmer, producer and designer he worked on Sega games like Phantasy Star, Puyo Pop Fever and many sequels to Sonic. He was the last of Sonic's original creative team to leave Sega and founded his own studio called Prope in 2006.
In 2018, Yuji Naka joined Square Enix to take on the role of director of Balan Wonderworld, a 3D platformer that was his first collaboration with his Sonic co-creator Naoto Ohshima since Sonic Adventure in 1998. It was launched in March this year, but the response was silenced. included later stroboscopic effects that could cause seizures were identified. It currently has a "Mixed" rating enabled Steam.