CREATE TABLE table_name_6 (dates VARCHAR, tournament_location VARCHAR, champion VARCHAR)

What dates was champion masahiro kawamura at the ibaraki country club tournament?
SELECT dates FROM table_name_6 WHERE tournament_location = "ibaraki country club" AND champion = "masahiro kawamura"
SELECT "dates" FROM "table_name_6" WHERE "champion" = "masahiro kawamura" AND "ibaraki country club" = "tournament_location"