I don’t think the japanese beleive in god.
I know one who does.
I met him in 1987 in Tyler, TX.
His name is Noboru Yoshida.
He became a christian and was promptly rejected by his family - a very painful thing for him. Still, he continued in his faith, and pleaded with us to pray for his family, that they may come to salvation. We did pray. I have no idea what became of Noboru.