The Tokyo-based company and the FarmVille maker are in talks to distribute and jointly promote games through SoftBank’s mobile-phone service in Japan and other countries, according to Nikkei English News (via Bloomberg).
Zynga made its first foray into the Asian market in May with the acquisition of Beijing’s XPD Media.
Earlier this month SoftBank led a $10 million (£6.93m) funding round for social gaming and apps developer RockYou.