Al Duhail recently announced the signing of Nakajima from Portuguese top-flight side Portimonense on a four and a half years contract, having earlier strengthened their ranks by bringing in Morocco international Medhi Benatia from Italian giants Juventus

Nakajima said he was excited about the transfer.

"I made the decision because everything about the club was attractive," the 24-year-old attacker said.

Nakajima joins Al Duhail, who won the Qatar Stars League, Qatar Cup and Emir Cup in 2018, from Portuguese club Portimonense.

"I will be moving from Portimonense to Al-Duhail," Nakajima wrote on his official blog.

"I'll continue to have fun playing football and work hard to get better at it! I had a wonderful time at Portimonense. I thank the club officials, the staff, and my teammates. I hope to enjoy my days at Al Duhail as much as possible!"

The reigning Qatar Stars League champions announced the 31-year-old’s arrival via their social media channels on Wednesday following protracted negotiations between the Doha-based club and their Serie A counterparts.

Since turning professional in 2005, Benatia has earned plaudits galore during his time in Europe where – besides winning numerous silverware with Juventus – he has featured for such heavyweights as Bayern Munich and Roma.

The 22-year-old centre-back, whose club Jeonbuk Hyundai Motors said they had received a bid from Watford reported to be about US$8 million, instead plumped for the Chinese Super League (CSL).

Guoan, who finished fourth in the CSL last season, announced Kim's signing but did not disclose the size of the transfer fee.

Coached by Germany's Roger Schmidt, Guoan will be hoping the established international can stiffen a defence that conceded 45 goals in the CSL last season.

Their place in the second stage was sealed at the expense of Singapore's Home United, the team who had ended Persija's 2018 AFC Cup campaign in the ASEAN Zonal semi-finals.

Ho Wai Loon's own goal in the ninth minute gave the Indonesian side the lead, but Song Ui-young restored parity two minutes from the break. However, second half goals from Beto Goncalves and Marko Simic gave Persija the win.

Yangon United defeated Philippines champions Ceres Negros at the Panaad Stadium in Bacolod to seal a Preliminary Stage Two encounter with Thailand's Chiangrai United in Bangkok on Tuesday.

The Myanmar side started positively and took the lead through Brazilian attacker Vinicius de Oliviera in the 29th minute, with Philippines international Stephan Schröck equalising for Ceres Negro just before the half time whistle was blown.

Yangon United, however, continued to press and substitute Kaung Htet Soe restored their lead in the 59th minute as they held on for the win.

Down 2-0 by the 31st minute, Kuwait SC fought back to seal a place in Stage Two, with a meeting with Islamic Republic of Iran's Zobahan FC on February 12 up next for them.

It was a thrilling tie from the first blow of the referee's whistle as Jordan's Al Wehdat seized immediate control of the match.

Their sustained pressure had Kuwait SC, appearing in the AFC Champions League for the first time since 2014, camped deep in their half.