user: Question: What dates was champion Masahiro Kawamura at the Ibaraki Country Club tournament?
Columns: ['Year', 'Dates', 'Champion', 'Country', 'Score', 'Tournament Location', 'Purse', "Winner's Share"]
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2013.0, '26–29 Sep', 'Masahiro Kawamura', 'Japan', '275 (−9)', 'Ibaraki Country Club', '¥150,000,000', '¥30,000,000']
SQL:

assistant: SELECT "Dates" FROM "Table" WHERE "Tournament Location" = 'Ibaraki Country Club' AND "Champion" = 'Masahiro Kawamura';