CREATE TABLE table_5135 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent in the Final" TEXT, "Score" TEXT)

Tournament of tokyo, japan, and a Score of 4 6, 6 4, 6 4 had which date attached?
SELECT "Date" FROM table_5135 WHERE "Tournament" = 'tokyo, japan' AND "Score" = '4–6, 6–4, 6–4'
SELECT "Date" FROM "table_5135" WHERE "Score" = '4–6, 6–4, 6–4' AND "Tournament" = 'tokyo, japan'