The veteran centre-back revealed he lost "3-4 kilos" over 90 minutes in the hot and humid conditions in Japan, and also reserved special praise for hometown hero Shinji Kagawa
The Red Devils needed an injury-time equaliser from substitute Wilfried Zaha against the J-League outfit in order to prevent a third defeat of the their pre-season tour of Asia.
But Ferdinand was grateful for the extensive workout, claiming it was amongst the hardest conditions he has played in, and believes United will be fitter as a result.
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“I said to the lads before I’ve never, ever, ever had an easy game in Japan. When we play against these teams they’re always good, they always play well.
“Tactically they're very good, all very comfortable on the ball, so I think it’s really good for us to come here because we get tested and because the Japanese guys are in the middle of the season, they’re all fit, [whereas] we’re still searching to be fit so it makes it hard for us.
“But it’s perfect conditions for us to become fitter.”
Ferdinand also praised local hero Shinji Kagawa, who made 125 appearances for Cerezo Osaka before joining Borussia Dortmund in 2010, and believes he can have a big impact at Old Trafford this season.
“It’s like David Beckham coming so he’s a hero here and rightly so,” Ferdinand continued.
“He’s got a big part to play, a big role to play.
“You see today with a great goal. He missed a penalty – too much pressure, maybe – but no, he’s a fantastic player, we love having him here and I think this season we’ll see a big improvement from last season.”