Japan's crushing 62-5 victory over South Korea, which took them to the top of the Asian Five Nations standings, reminded Hong Kong of the tough task facing them and "once again confirmed that Japan are by far the best team in Asia", according to team manager Dai Rees. Japan ran in nine tries in Incheon on Saturday to stand one game away from qualifying for the 2015 World Cup in England. The only team standing in their way are Hong Kong, who travel to Tokyo for next Sunday's clash which will decide the direct qualifier from Asia. "[Saturday's] win over Korea has confirmed that Japan are the outstanding team in Asia," Rees said. [Japan] will come hard at us. The first half hour will be huge and the key will be to stay in touch Dai Rees "We know nothing more [after this result] than what we already knew that they are out in front of the rest. They have never failed to qualify and are favourites to do so again. But we will give it our best shot." Japan and Hong Kong are tied on 18 points in the A5N standings, although Japan are on top due to a superior points difference. The winners of next Sunday's clash at the Tokyo Olympic Stadium will book a berth in pool B alongside South Africa, Samoa, Scotland and the United States. The losers will enter the first round repêchage, away to Uruguay in Montevideo on August 2. Hong Kong have never beaten Japan in the six years of the A5N. In each of their three fixtures in Tokyo, Japan have scored more than 50 points against Hong Kong, who will once again go into the game as carry underdogs despite an impressive 2014 campaign. Hong Kong have so far defeated the Philippines (108-0), Sri Lanka (42-10) and South Korea (39-6). But on Saturday, Japan hammered home their superiority and desire with a powerful performance set up by their forwards, who dominated the scrums, the line-outs and the break down against Korea. Hong Kong took the entire 80 minutes to run in five tries against Korea. Japan did that in the first half alone as they led 34-0. Six of their nine tries were scored from set-piece play from close range. "We cannot afford to give away field possession and concede scrums and line-outs close to our try-line," Rees said. "We will have to minimise our mistakes and defend very well. They will come hard at us. Our [previous A5N] performances will have raised awareness and they will want to make a statement early in the game. The first half hour will be huge and the key will be to stay in touch. "There is an air of excitement in the [Hong Kong] squad and everyone is looking forward to the game," Rees added. "It will be a great occasion, made memorable by the fact that this will be the last game at the National Olympic Stadium," he said, referring to the fact that the venue will soon be torn down and rebuilt for the 2020 Olympic Games.