The newly-built church is described in a 1644 report:
Alms were given this year to crown the main façade of this Church, which is all of carved stone in a Roman manner. From top to bottom it has three orders of columns with their pedestals, six arched niches in good proportion; four of the ones which are half domes are on the first frieze amongst the orders of the second order of columns, each by itself next to the opening of the three windows of the choir: in them there are the half length figures of our Saints Ignatius, Xavier, Borja and Gonzaga, each one in his niche, over stone bases with their names carved ont them in the same order as we have them on the main altar: all in bronze with their foundry signs: hands and faces painted red; vestments gilded throughout the length of the body, with no other colour.
On the second frieze and third storey with columns that rest on the middle window the Image of Our Lady of the Assumption, titular saint of the Church, has its niche, which image steps on a large gilded moon; over her head two Angels in the round of the same metal appear to be holding a closed crown, each of which holds out his arm on the side where he is. Below these another pair seem to go through the air giving a hand in favour of Our Lady's ascent.
The third frieze, which runs underneath the last storey, gave place to the last niche. It has on its base the Image of the infant Jesus with a cross on the globe of the world on his hand and which does not differ from the others in anything, except that it is of lesser height than them. Inside the field of the pointed summit which makes a straight triangle – on which rests the stone pedestal on which is to be fixed the iron cross with rod arms that is the crown of the whole work, for which alms were given this year as I said above – from the middle of rays carved in the stone, a kind of image of a dove goes forth, representing the Holy Spirit with its wings wide open, in gilded bronze and of significant size. Note: for all of this magnificent and sumptuous work expenses were met with alms.
Litterae Annua of 1644 for the Japan Province written by António Ferreira, in the archives of the Historical Institute of the Society of Jesus, in Rome, translated by Cesar Guillen-Nuñez