You have to look beyond the title which has more layers of meaning than it superficially suggests. Sounded quite heavy but the beginning was very funny and well done with two (later three) characters but got heavy again later. It's a weird tale but sucks you in (if you see what I mine). The rushed ending I find rather too "neat" and unsatisfying. Further comment under spoiler. "Cuts" in film are an easy option to jump time. They are risky and don't always work. One positive message suggested to me is that you do not have to "do" or perform a job, activity, vocation or whatever to "prove" your value as a person. Music - less is sometimes more and imo it would have been more effective to leave it out at some intimate points. Not one I'm likely to re-watch. It made its point first time round. Overall I'd go with the majority opinion of 8/10.

Not important but the younger guy did not look Japanese - OK I know I should not "stereotype". Avoid if you object strongly to cigarettes.