Kawakami is the 21st head of the Ban family, one of 53 that made up the Koka ninja clan.

BBC: Japan's ninjas heading for extinction

Winger Jean de Villiers was banned for two weeks for a dangerous tackle during the 31-17 loss on 17 July, and a week before that, Bakkies Botha earned a nine-week ban for a head-butt.

BBC: South Africa coach hints at refereeing 'conspiracy'

Mauritania's Organization of Consumer Protection head Moctar Ould Tauf said he welcomed the ban, Efe news agency reports.

BBC: Mauritania bans plastic bag use