The new retained brief was won following a pitch process, with Headland CEO Chris Salt leading the account as the restaurant seeks to develop its corporate credibility in the UK and overseas.
YO! Sushi, which also retains LightBrigade PR for consumer PR, currently has 80 restaurants but is looking to expand its empire with plans to build 50 more franchises Stateside.
COO Vanessa Hall recently took on the role of CEO previously held by Robin Rowland amid reports that private equity owners Quilvest had hired bankers to explore interest in the business.
Salt said: "There are a huge amount of growth opportunities, and part of our role will be to bring a great awareness of the depth of management skill at the company, and the opportunities that the brand has going forward."
Founded in 1997, the group claims to serve around six million customers annually and has posted 4.6 per cent growth in sales to £71.m for the year ending 30 November.