digitalarchives.wa.gov has their marriage in 1911. Yohei is listed as 27, from Okayama-ken(???, Okayama Prefecture), his parents are listed as Tasaka Takatsuka, and Iso Itaya, also from Okayama. Aya is 22, from Yamaguchi-ken (???, Yamaguchi prefecture), her father is listed as Yataro Taki from Yamaguchi and her mother as Sue Takenouchi, from Saitama.