user: Question: What event did he fight Masato Shiozawa?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Win', '6-1', 'Kenji Osawa', 'Decision(majority)', 'Shooto - Back To Our Roots 3', 1.0]
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Opponent" = 'Masato Shiozawa';