In the UK show Dragon's Den, which Dragon founded the Yo! Sushi restaurant chain?

Simon Woodroffe founded the Yo! Sushi restaurant chain before becoming an investor on the UK show Dragon's Den.

Woodroffe launched Yo! Sushi in London in 1997. The restaurants became known for serving dishes on a conveyor belt, allowing customers to select food as it passed their table. This helped make the brand distinctive in the British casual-dining market.

He later became one of the original Dragons on the BBC programme. His background differed from that of some fellow investors because his best-known entrepreneurial success was in hospitality and design-led consumer businesses.

Yo! Sushi is not a Dragon's Den business created during a pitch. It was Woodroffe's own venture, established years before his television role. That distinction explains why the answer is the investor rather than an entrepreneur appearing in a particular episode.