TOKYO, May 23 (Reuters) - SoftBank Group Corp said on Wednesday it is selling its roughly 20 percent stake in Indian e-commerce firm Flipkart to Walmart Inc .
Walmart said earlier this month it will pay $16 billion for a roughly 77 percent stake in Flipkart, the U.S. retailer's largest-ever deal.
A SoftBank spokesman declined to give further details.
SoftBank CEO Masayoshi Son said earlier this month the $2.5 billion investment through its private equity fund in Flipkart made last year was worth $4 billion. (Reporting by Sam Nussey; Editing by Muralikumar Anantharaman)