In the spring of 1587 Tama managed to secretly visit the Osaka church; a few months later, when she heard that Toyotomi Hideyoshi had issued a proclamation against Christianity, she was determined to be baptized immediately.
Na jar v roku 1587 Tama tajne navštívila kostol v Osake; o pár mesiacov neskôr, keď počula, že Hidejoši Tojotomi vydal proklamáciu proti kresťanstvu, sa ihneď odhodlala dať sa pokrstiť.