Japanese roommate culture

I (M20) am living in a student dorm with my roommate (non-student M24) and we have not gotten along very well. I want to take this as an opportunity to understand Japanese culture better. I also have had trouble in the past with setting proper boundaries, so an even better learning opportunity.

The reason I post this is because earlier tonight (past our no-noise agreement time) I started spontaneously crying because I’m grieving a family member. I usually cry silently, but this time I lowkey thought he wasn’t here, so I let it out a bit more, but not too loud. Turns out he was indeed there, and a few minutes after I started crying I hear a knock on my room and he says “I’m trying to sleep”. I say sorry, then go outside to let it out. I know that Japanese people have a reputation for stigmatizing public displays of emotion, but I would expect at least an “are you okay?” or something. Honestly it makes me feel quite uncomfortable because I feel like I’ll get punished for a spontaneous show of emotion. Is this the Japanese experience?

I’ve been quite accommodating to his needs before this, he heard me typing/using a controller in my room past 11 and confronted me, so I moved my late night gaming to the dorm’s study rooms.

I try to help out whenever he is doing things around the dorm, but he never looks me in the eyes, or says hello in the halls for that matter. I understand he probably doesn’t want to be my friend, but it feels weird for roommates to be so distant. Is that just the American in me speaking, and Japan does it differently?

He also tends to come out to the common area (separated by a long hall and several doors) and tell us to be quiet when my friends and I are hanging out. He says that he is a light sleeper, which I understand, but wouldn’t some earplugs fix the issue?

I feel like on the line between respect and entitlement, to me it seems like he’s teetering on the side of entitlement, especially given he’s a non-student living in a student dorm. Though I would like to know if there are some unspoken Japanese rules or cultural connotations I could better understand here. Thanks!!