user: Question: Which Res has a Method of Decision (unanimous) and an Opponent of Wataru Sakata?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Win', '13-4', 'Lee Hasdell', 'Submission (rear naked choke)', 'Cage Rage 22', '1', '1:39', 'London , England']
SQL:

assistant: SELECT "Res." FROM "Table" WHERE "Method" = 'Decision (unanimous)' AND "Opponent" = 'Wataru Sakata';