Prime Minister Shinzo Abe said Monday that Japan is ready to cooperate with China's "One Belt, One Road" cross-continental infrastructure development scheme, under certain conditions.

Speaking at a forum in Tokyo on Asia's future, Abe said those conditions would include "harmony with a free and fair Trans-Pacific economic zone," alluding to the terms of the Trans-Pacific Partnership free trade pact, to which Japan is a signatory but China is not.

The One Belt, One Road initiative, put forward by Chinese President Xi Jinping in 2013, would involve massive investment to connect up both a land-based economic belt based off the ancient Silk Road and a maritime corridor spanning from China to Southeast Asia, India, Africa and Europe.