Leased lines between company offices cost up to four times more than in America.

ECONOMIST: Wiring corporate Japan

And, since the beginning of April, foreign companies have been able to connect their private leased lines to the Japanese domestic network.

ECONOMIST: Deregulation in Japan

From next April, competition will become still fiercer: foreign companies will be allowed to connect their private leased lines to the Japanese domestic network.

ECONOMIST: Japanese telecoms

"In terms of leased lines, it's a savings of about 50 percent, " said Jonathan Levy, managing director of Pentagon Communications, a multimedia company that offers video production, radio production and interactive media production services.

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The Alamodome in San Antonio, water lines in New Jersey, and sewers in Germany have been purchased from and leased back to public authorities under these deals.

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