Naoya Inoue successfully defended his undisputed super-bantamweight championship with a close but uncontroversial 12-round unanimous decision over Junto Nakatani in their eagerly anticipated showdown at the Tokyo Dome on Saturday night. Before a sellout crowd of about 55,000 spectators during Japan’s Golden Week holiday, Inoue held off a fierce late surge from his unbeaten rival to win by scores of 116-112, 116-112 and 115-113 and retain the WBA, WBC, IBF and WBO belts at 122lb, extending his perfect record in what had been billed as the biggest fight in Japanese boxing history . (The Guardian had it 115-113 for Inoue.) The four-division world champion nicknamed the Monster had spoken during fight week about wanting to “prove that I’m still Naoya Inoue”, perhaps a nod to the whispers of his purported decline.…