when his father died ten years ago, murakami found himself unable to recite the prayers correctly. >> translator: i was so frustrated with myself at that time. i came here for three years, and mem. >> marty:i:ized all the prays.s. i've changed. i'm glad to be a hidden christian. >> reporter: today murakami fears that hidden christians could disappear. he is calling on all the group leaders to join forces and protecect their beliefs and strengthen the community. he makes every effort to document his faith. he's been recording his prayers and rituals. he hopes to pass them on to his successor, but he has not found one yet. the annual mass begins at a sacred location. the attendees are christian, catholic and buddhist, and all have come to help. >> translator: everybody here was a hidden christian back then. >> translator: we've been working totogether to maintainie traditioion. >> reporter: the ancient prayers come in. >> translator: this is a moment the locals reflect on a time when their ancestors were united as hiddeden christians. >> translator: our faith didn't end underground. it'