I agree with cherrystark, in that you do a lot of telling. I think you can delete the first paragraph altogether, and just focus on Adachi's interactions with his family and the conditions of his house to express his current boredom and the monotony of his day to day. The incident with the truck is also a great opportunity to expand on Adachi's character traits -- being extremely reckless on the off-chance he might escape his life for something more interesting to the point of throwing himself in front of a moving vehicle. It may also be worth exploring the selfish origin of that otherwise kind and self-sacrificing action in later chapters.
I love the contrast of Adachi's traditional family home and his desire for something new. I think you could play in the scenery a bit more. Take some time to describe what its like to sit on the floor at dinner, how it feels to walk down a hallway that was probably built before electricity was installed. What's in disrepair? Does his father do most of the repair work on the house? This could give us some insight into the finances of Adachi's family, since his father is mostly worried about money and not the confrontation at hand. His father's focus on money could also be played against his mother's melodramatic behavior -- is she a big spender? Is she as frugal as his father? What does she wear, what does she insist on cooking? Is there any sort of tension there that could influence how badly Adachi wants to escape?
From a purely prose standpoint, I would suggest trying to rework some sentences and cutting down on the use of passive voice. These are words like was, were, had, etc. If you can rephrase these sentences into actions. For example, the impact of these two sentences are way different:
"Sitting at the dinner table in his cozy, traditional home, Adachi was engulfed by the soothing aroma of simmering miso soup."
vs
"In the kitchen, his mother Eiko flitted about like a manic butterfly, a master at turning even the simplest mishaps into epic tragedies."
In the first, you tell us Adachi's home is traditional, but not how it's traditional. You tell us that the soup is soothing, without describing the smell or showing how it makes Adachi feel. We can't tell if this is his favorite meal, if he's looking forward to it, or if it's just soothing because soup tends to be that way. In the second, you paint a picture of his mother and her behavior -- a flitting, theatric master of drama. We have seen her, we know exactly what she's like and can visualize her activity in the kitchen.
Sorry, this got a bit longer than I intended. I really hope it helps, though!