The Chongqing Procuratorate has sent the case to Chongqing Municipal No 1 Intermediate People's Court for prosecution.
The first list containing details of Unit 731's war criminals was released in Japan after a request in 2015, but information on the unit's participants was heavily redacted.
He said the Chinese mainland is willing to share the development opportunities with Taiwan compatriots, deepen the cross-Straits economic and cultural exchange and cooperation, and bring tangible benefits to Taiwan compatriots and enterprises.
Liu Jieyi, director of the Taiwan Affairs Office of the State Council, met Hung Hsiu-chu, former Kuomintang (KMT) chairwoman, and Yok Mu-ming, chairman of Taiwan's New Party, respectively in the northwestern city of Xi'an.
China's top legislative and political advisory body started its annual sessions, kicking off an important political season that will highlight new missions for the country's goal of a "great modern socialist country".
This year marks the 40th anniversary of China's reform and opening-up policy, and socialism with Chinese characteristics has entered a new era, Xi said.
Abe, for his part, said that Japan attaches high importance to its relationship with China. It is willing to take the opportunity of the 40th anniversary of the signing of the Japan-China Treaty of Peace and Friendship to promote comprehensive improvement of bilateral ties, to realize high-level exchanges, and to expand cooperation under the framework of strategic relationship of mutual benefit.