4 Princes Buildings, George Street, Bath BA1 2ED; Tel: 01225 614424; robun.co.uk Melissa Blease discovers some tantalising Japanese dishes at Robun’s new fine dining establishment in George Street – from Chicken Karaage and Nasu Dengaku to Bluefin Tuna Tatare and Japanese Mochi – and talks to CEO Roger Payne Zensai, karaage...