Abe told the Financial Times that Britain would lose its role as a gateway to Europe after Brexit, but would still be a country "equipped with global strength."
Eleven countries circling the Pacific signed a slimmed-down version of the Trans-Pacific Partnership or TPP in March -- opting to proceed with the trade deal after it was left for dead when US President Donald Trump pulled out to pursue his "America First" agenda.
The US president has since sparked fears of a trade war by levying steep tariffs and denouncing unfair trading practices.
"I hope that both sides can contribute their wisdom and at least avoid a so-called disorderly Brexit," Abe said.
"I truly hope that the negative impact of Brexit to the global economy, including Japanese businesses, will be minimised," he added.
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