CREATE TABLE table_72999 ("Round" FLOAT, "Date" TEXT, "Grand Prix" TEXT, "Circuit" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT)

Which round 5 Grand Prix had Daijiro Hiura at pole position?
SELECT "Grand Prix" FROM table_72999 WHERE "Pole Position" = 'Daijiro Hiura' AND "Round" = '5'
SELECT "Grand Prix" FROM "table_72999" WHERE "Pole Position" = 'Daijiro Hiura' AND "Round" = '5'