NTT DoCoMo Inc. will soon start selling a Dick Tracy-style mobile phone that's wearable like a wristwatch and snaps off to become a regular handset.

"We are targeting young businessmen in their 20s and 30s as the device looks a bit rugged," DoCoMo spokesman Takuya Kono said.

The Wristomo watch opens up to become a phone, and users can talk while wearing it -- just like the U.S. comic-book hero.

Manufactured by Seiko Instruments, the phone weighs 113 grams, including batteries, and hooks up to DoCoMo's i-mode Net-linking service.

The company expects to sell 5,000 of the phones, which will run 30,000 yen to 40,000 yen. They will be sold through a Web site starting next month.