TOKYO, Oct 20 (Reuters) - The Bank of Japan may slightly revise up this year's growth forecast next week and maintain its view the economy was on course for a moderate recovery, despite headwinds from U.S. tariffs, said three sources familiar with its thinking. At the next policy meeting on October 29-30, the BOJ will conduct a quarterly review of its growth and price forecasts. (Reporting by Leika Kihara and Takahiko Wada; Editing by Toby Chopra) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)