On November 6, 2017, Mariko Watabe newly achieved another stage name of Kyosho Yamato from the head master of Yamatogaku School, O-sho Yamato. The ceremony took place at Hie-Shrine in Akasaka in Tokyo followed by a formal meal.

Hie Jinja (Temple)

Head master, O-sho Yamato and Kyosho Yamato

The sign board of Kyosho Yamato