Mobile phone giant NTT DoCoMo Inc. and Dai Nippon Printing Co. announced Tuesday they will jointly launch an e-bookstore starting Wednesday to expand their business in the growing business.

The new venture firm, named 2Dfacto Inc., will launch the e-bookstore with about 20,000 titles, none in English, and it plans to expand the total number of titles available to about 100,000 by the spring, they said.

While the e-bookstore, also named 2Dfacto, will allow only DoCoMo users to read e-books on some of DoCoMo's smart phones and e-reader for now, DoCoMo said it is possible that the service may be available on other carriers' devices in the future, as it wants the service to be open to many potential customers.