CREATE TABLE table_28341 ("Dates" TEXT, "Tournament" TEXT, "Location" TEXT, "Prize fund  (  \\uffe5  ) " FLOAT, "Winner" TEXT, "OWGR pts" FLOAT)

What is the date of the tournament at Hokkaid with prize of 150000000?
SELECT "Dates" FROM table_28341 WHERE "Location" = 'Hokkaidō' AND "Prize fund ( \uffe5 )" = '150000000'
SELECT "Dates" FROM "table_28341" WHERE "Location" = 'Hokkaidō' AND "Prize fund ( \uffe5 )" = '150000000'