Four-time AFC Asian Cup champions Japan raised their game after trailing 1-0 against Turkmenistan at the break but some tweaking by Moriyasu saw a vastly different side in the second half as the Samurai Blue eventually won 3-2.

Oman, having suffered a 2-1 defeat to Uzbekistan in their opener, need a win to keep their hopes alive and head coach Pim Verbeek promised that his team will give it their all at the Zayed Sports City Stadium in Abu Dhabi.

Four-time champions Japan had to come from behind to defeat Turkmenistan 3-2 in their Group F tie on Wednesday and Nagatomo said it was a lesson well learnt.

"We struggled against Turkmenistan but it was very important for us players to know what the AFC Asian Cup is," said the 32-year-old, who plays for Turkish club Galatasaray.

"We will use the experience gained against Turkmenistan to good effect. We have had three days to prepare for our next match against Oman (on Sunday) and we are confident of a better showing."

The four-time Asian champions went into the break trailing 1-0 after Arslanmurat Amanov’s stunning long-range strike had threatened to earn Turkmenistan their first-ever victory at the continental Finals.

However, a much-improved Japanese display after the break – which saw Yuya Osako score twice and Ritsu Doan add a third – proved enough to seal all three points for Japan despite a late scare courtesy of Ahmet Atayev’s 79th minute penalty.

The four-time champions of Asia had trailed 1-0 going into half-time, but a rousing performance in the second half saw Hajime Moriyasu’s charges eventually claim all three points and top spot in Group F.

Despite Japan’s first-half woes, Nagatomo – an ever-present when his nation claimed the AFC Asian Cup title in 2011 – proved to be a calming influence in a side which was clearly transformed after the break.

Trailing 1-0 at half-time, Yuya Osaka’s brace and a goal from Ritsu Doan proved the difference in a game which had seen four-time champions Japan trailing at half-time before a spirited revival ensured all three points for Hajime Moriyasu’s charges.

The result takes Japan to the top of Group F where they are level on points with Uzbekistan who beat Oman 2-1 in the group's later game.

Uzbekistan led 1-0 at the break following Odil Ahmedov's curling free-kick at the Sharjah Stadium.

Oman, however, clawed their way back into the game when substitute Muhsen Al Ghassani pulled his side level in the 72nd minute.

But with five minutes left, Eldor Shomurodov produced a moment of brilliance after coming on as a second-half substitute to ensure Cuper’s men got their UAE 2019 campaign off to a winning start.

The win took Uzbekistan to second in the standings behind Japan, who defeated Turkmenistan 3-2 in their opening tie earlier on Wednesday.

Oman started aggressively, as they tested the Uzbekistan defence with several surging runs and in the 14th minute, came close to scoring through Ahmed Al Mahaijri’s header which goalkeeper Ignatiy Nesterov brilliantly saved.

Oman’s confidence grew as they pegged the White Wolves in their own half and in the 25th minute, Saad Al Mukhaini’s delivery from the right flank sailed invitingly for Raed Saleh but the forward failed to connect.