Sasahara was a last-minute addition to the Team Mugen set-up for this season, having initially looked set to miss out on a permanent seat within the Honda stable for a second season in a row.
Starting his year with a pole position at Fuji, the 26-year-old went on to score his first win at the same track in July, and added a second triumph in the opening race of last weekend's Suzuka double-header finale.
