TOKYO - JAPAN'S top banks have hundreds of millions of dollars exposed to Dubai World, the Gulf conglomerate teetering on the brink of a potential debt crisis, analysts said on Friday.

Japan's largest banks Mitsubishi UFJ Financial and Sumitomo Mitsui are among a consortium of 11 creditors that have lent to Dubai World, one of Dubai's flagship groups, analysts at Citigroup said.

Sumitomo Mitsui is owed more than US$200 million (S$277.56 billion) by the entity, sources familiar with the matter told AFP separately.

Citigroup said the remaining lenders are largely composed of European and Middle Eastern banks, adding that their loans total US$16.5 billion. An MUFJ spokesman declined to comment.

Media reports have also said Japan's second biggest bank Mizuho has an exposure worth US$100 million. A spokesman declined to confirm the reports, saying that the bank does not comment on individual deals.

At the Tokyo Stock Exchange, MUFJ shares closed down 10 points or 2.20 per cent at 444 yen, while Sumitomo Mitsui shares fell 100 points or 3.67 per cent to 2,620 yen.