但是，从21世纪初期开始，常被泛称为“渡边太太”的日本家庭主妇们开始追求更高的回报。（渡边是日本一个常见姓氏）
But from the early 2000s , the housewives - often referred to collectively as " Mrs Watanabe " , a common Japanese surname - began to hunt for higher returns .
日本姓氏