The em-town Internet shopping mall operated by Mizuho Bank, Mizuho Corporate Bank and 43 other companies will shut down on Oct. 31.
A Mizuho Bank spokesman said the portal has not been as popular as its operators had expected.
The Mizuho Financial Group created the portal in January 2001 with partners including Nippon Telegraph and Telephone Corp., Hitachi Ltd. and Fujitsu Ltd.
Em-town Corp., capitalized by Mizuho and its partners, has run the portal on a membership fee basis.
Various companies have offered a range of commodities and financial services through the portal, including computers and insurance.
But the company has failed to reach its goal of signing up 100,000 members in its initial year of operation due to competition from other Net shopping sites that do not charge an access fee.
The company currently has 54,000 paying members.
"Em" is short for Electronic Mizuho.
Mizuho Bank said it will keep in place its Net branch, which it opened Jan. 31, 2001.
The bank's Net branch, which provides financial services such as housing loans and deposit accounts, has already drawn 100,000 customers, according to Mizuho Bank.
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