"The Only Son" is Ozu's first "talkie" - and utilizes sounds/dialogue in a stylistic manner to tell a simple story. The beautiful simplicity that pervades the piece is classical Ozu, and amplifies the poignant tale of a mother coming back to visit her son, after sacrificing her livelihood to ensure he achieves higher education. When she realizes that he is unsatisfied with his life as a night-school teacher, a general melancholic tone begins to unfold through the progression of the narrative.
There are some fine indoor shots of the house where the son lives, and also, some greatly composed scenes of the run-down industrial neighborhood where the son goes out to buy "noodles" from a nearby stand. What's also memorable about the film is its excellent rendition of outdoor nature shots, one scene stands out in my mind where the son is having a discussion with his mother. There is also a great shot of the night-school teacher looking out dismal and lonely from the school-building to a city sign, which is juxtaposed against a dark, night sky.
The ending is nicely done, and overall, the film is crafted in that spare, simple perfection that is the stylistic hallmark of Ozu's cinema.