I dunno, man. It feels like as if a British writer would write up a British character, that gets berated for "drinking alcohol in the afternoon after work / during work breaks" (they have the habit of hitting the pubs something fierce). Why would a Brit consider that "a weakness", if it's so ingrained in their culture? Only someone who views it from the outside would point out and say "this is weird."
But, I'm getting the feeling that if anything is "Japanese", it'd just be the writers. That is to say, people who end up writing *really* agreeable protagonists, that are easy to work with / torment. It is easy to apply force on something that changes shape in which ever way you press on it.
That at least means that there's zero self-aware commentary here, just culture-meta about being insanely pliable at the hands of others.