Takeru Satho really needs to move on from committing to merlodrama scripts that involve his character's love interest suffering from amenesia (like his movie 8 Year Engagement had this same thing)
Cinematography becomes that one standout mark of this show that I cannot help but continously sing praises of (it was preety much evident from the trailers that they will excel in this department)
The plot sure is slow but its steady, could have been easily compressed into an 7 ep show rather than 9, the first 2 episodes are hard to sit through cause the story is building it's plotline causing it to feel slow but don’t quit because everything gets better from ep 3
Has few "cliché" tropes but that isn't underwhelming because "clichés" are called "clichés" because they work like a charm. The show is at it's strongest in the final 3 episodes.
The actor who played Young Harumichi is by far the strong link of this show, like his acting outshined Takeru Satoh's in some scenes and that is an achievement if you ask me (as if his acting wasn't an help already, he had to looks cute as well).
Takeru and the female lead actress both being veteran actors really benifit the acting department, there are few moments that come out to be sooo impactfull, solely because the actors gave it their all in making it look as if it happened in their own lives.
One final thing, they should raise bar of the age rating from 15 to 17+ (you'll know why I suggest this once anyone who decides to watch this is almost midway into the show)