Softbank Mobile Corp., the exclusive sales agent for Apple Inc.'s iPhone in Japan, said Friday it suspended advance orders for the newest iPhone 4 handsets the same day because it got more orders than expected.

The mobile phone unit of Softbank Corp. began accepting preorders Tuesday afternoon at affiliated outlets and consumer electronics retailers nationwide.

Preorders for the latest version of the gadget have already exceeded Softbank Mobile's previous record for a single handset, company officials said.

When the latest model hits stores next Tuesday, the preorders will limit the number of handsets available for walk-in purchases at certain retailers in Tokyo and Osaka, the officials said.