With more than twenty games in the official Harvest Moon, now Story of Seasons, series it’s safe to say the series is a mainstay in the farming simulator genre. However, in the last ten years a split between the developer and publisher of the pre-2013 Harvest Moon games has resulted in a series that still uses the Harvest Moon name alongside the actual/original Harvest Moon series now titled Story of Seasons.
Source: https://www.distractify.com/p/why-did-harvest-moon-change-name