. . "Mizuho Securities" . . . . . . . . . "Mizuho Securities" . . . "Mizuho Securities Co., Ltd." . . "\u307F\u305A\u307B\u8A3C\u5238\u682A\u5F0F\u4F1A\u793E" . . . . . . . "Mizuho Securities Co." . "6994" . "Mizuho International Plc" . . . . . . .