Help! I don’t know which movie this is!

It’s a movie  about a salaryman who is very overworked and ends up fainting at a train station and almost falling onto the tracks. Another man saves him and they become friends because this man was like they were old classmates. In the end it turns out this man’s brother had committed suicide and that’s why he wanted to save this salaryman.

I’m pretty sure the movie is Japanese.

Can somebody please help  me find it?

 Minarii:

I haven't seen it, but it sounds like To Each His Own

https://mydramalist.com/19876-to-each-his-own

It is J-movie 'To Each His Own'. I watched it recently.