After years of slugging it out in the raised ring, sumo wrestler Masumeidai now wants to prove he has the brains to match his brawn.

Masumeidai, only the third wrestler to enter the sumo world from a national university, has decided to retire from the national sport and take a stab at journalism, a career move virtually unheard of.

But the 26-year-old, whose real name is Shuichi Tanaka, admits he is dreading the prospect of having to dig up dirt on a sport that has been plunged into the match-fixing scandal, its biggest crisis ever.