Abe's remark came days after European leaders agreed to delay the deadline for the UK's exit from the European bloc until October 31, with a review in June.
The British Parliament had rejected May's Brexit deal thrice. Parliamentarians have also rejected four alternative proposals for the UK's exit from the EU.
The UK was due to leave on April 12 without a deal. However, the EU called a marathon emergency summit to prevent 'no deal' Brexit.
During the summit, the leaders exchanged views on Theresa May's Brexit deal and held lengthy discussions on the extension to allow more time for the UK to leave the EU without any agreement, CNN reported.
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