Chieko Asanuma, 28, who delivered her second child five months ago, said she was a little anxious about the new system at first, which does have glitches like bad signals and dropped links.

• 5个月前，28岁的浅沼千惠子生下第二个小孩，她说，刚开始她对这套新系统有点疑虑，因为它会发生收讯不良、连线中断这类故障。