Japan booked their ticket to the knockout stage of the Asian Cup in the United Arab Emirates on Sunday with a 1-0 win over Group F opponents Oman, but the four-time champions were once again less than convincing.Relying on a first-half penalty from Genki Haraguchi to give them victory, Hajime Moriyasu's side never looked settled despite creating several chances and dominating possession at Abu Dhabi's Zayed Sports City Stadium.The result followed their 3-2 win over Turkmenistan on Wednesday -- another shaky display against an opponent they were expected to beat comfortably.Moriyasu made two…READ FULL ARTICLE