Please answer the following question: Question: Who is Saeki? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: Memories of tomorrow Context: In MEMORIES OF TOMORROW, Ken Watanabe plays Saeki, a 50-year-old ad executive whose life is practically perfect: he commands the respect of his employees, he loves his wife Emiko (Kanako Higuchi) and his daughter will marry soon. But one day, Saeki has trouble remembering names and confusion sets in. His wife convinces him to visit a doctor, who delivers a devastating diagnosis: early-onset Alzheimers. MEMORIES OF TOMORROW follows Saeki and Emiko as the couple embarks on a journey where every day marks a step closer to losing everything. In this very personal film, Watanabe delivers one of the most remarkable performances of his career.
A:
ad executive