People.com Celebrity Parents Princess Aiko: Walkin' in the Rain By Staff Author Published on June 26, 2006 01:00 PM Share Tweet Pin Email by auditioning contributor Lorelei: Even royal children have to walk to school in the rain. Princess Aiko, the four year-old daughter of Crown Prince Naruhito of Japan, was snapped walking to school with her father while holding her own umbrella. The princess currently attends Gakushuin Kindergarten in Tokyo. If Princess Aiko’s aunt, Princess Kiko, gives birth to a baby girl this fall, Aiko may become the first girl to ascend the Japanese throne. Currently, only males may become rulers of the Pacific nation. Source: Hello Thanks to CBB reader Mary Beth.