Japanese officials said the experiments would begin in December and take three years, the Kyodo news service reported.
The project would use the Internet Protocol Version 6 (IPv6) and achieve speeds of up to 100 Mb per second, comparable to fiber-optic cables and much faster than the current 3G cellphone maximum of 2.4 Mb per second.
The Japan-China project will test the cellphone for projects such as data content creation about Chinese cities, a Chinese business database and translating technology for Japanese and Chinese languages.
The new bandwidth potentially promises video conferencing, high-resolution movie transmission and high-speed Internet access on cellphones.
Several universities and companies will take part in the initial project stages, including Kyoto University, Beijing University and Fujitsu Ltd., the officials said. Japan's NTT DoCoMo Inc. is opening a Beijing office, the Japan Times, a Japanese daily reported, in a possible attempt to explore the 4G potential of China.
Japan leads the world in IPv6-related technology, and hopes to make it a global standard.