Eiri "Bamboo Shoots" Family Home Page

I am researching both my husband's side of the family, Eiri (father) and Okubo(Mother). I am also researching my side of the family, Yamamura (father) and Masuda (mother).
Eiri: Shigeo Alfred Eiri
Jean Teru Okubo

Yamamura: Kaneto Yamamura
Shizuko Masuda
Mr. Eiri and Mr. and Mrs. Yamamura are first generation from Japan. Mrs. Teru Okubo was born in California.

Anything you could provide re these families would be greatly apppreciated, or if you can assist me in where I can go to search for background information would be real helpful.