user: Question: Who was the winner when Katsuyuki Hiranaka had the fastest lap?
Columns: ['Round', 'Track', 'Date', 'Pole Position', 'Fastest Lap', 'Winner', 'Team']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Motegi', '3 April', 'Yuji Ide', 'Katsuyuki Hiranaka', 'Richard Lyons', 'DoCoMoTeam Dandelion Racing']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Fastest Lap" = 'Katsuyuki Hiranaka';