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Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.
There are many rules that govern sumo wrestling, the Japanese sport that operates on the principle of pushing another man down or out of a circular clay ring. But what epitomises wrestlers, in Japan at least, is their distinctive topknot.
The mage topknots originated around the 17th century, favoured by the Samurai warrior class. When the Edo period ended in the…

