user: Question: what character did Naoko Watanabe play
Columns: ['Character Name', 'Voice Actor (Japanese)', 'Voice Actor (English 1997 / Saban)', 'Voice Actor (English 1998 / Pioneer)', 'Voice Actor (English 2006 / FUNimation)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Goku', 'Masako Nozawa', 'Ian James Corlett', 'Peter Kelamis', 'Sean Schemmel']
SQL:

assistant: SELECT "Character Name" FROM "Table" WHERE "Voice Actor (Japanese)" = 'Naoko Watanabe';