Question: Aiko, Princess Toshi is the only child of Crown Prince Naruhito and what princess who was born on December 9, 1963, and is a member of the Imperial house of Japan through marriage?
Sentence (from "Wilhelm, German Crown Prince"): Wilhelm, German Crown Prince (German: "Kronprinz Wilhelm von Preußen" ; 6 May 1882 – 20 July 1951) , full name Friedrich Wilhelm Victor August Ernst, was the eldest child of the future German Emperor Wilhelm II and his wife Empress Augusta Victoria, and the last Crown Prince of the German Empire and the Kingdom of Prussia.
Relevant evidence: No