Nigeria's Golden Eaglets suffered a 1-0 defeat to Japan in their final warm-up match before the 2019 FIFA U-17 World Cup in Brazil.
A lone strike by Wakatsuki Yamato in the 22nd minute of the encounter gave the Japanese victory at the Sao Paulo Football Club ground in Coita, Sao Paulo.
Golden Eaglets lost their first warm-up game 2-1 to Sao Paulo but rallied back to beat South Korea 4-2 in the second.
Manu Garba’s boys will begin their 2019 World Cup campaign on Saturday against Hungary at the Goiania Estadio Olimpico.
They will also face Ecuador and Australia in the first round of the competition.