Out of the three I've seen, he isn't central in 13 Assassins much, but when he is is very memorable.
Tokyo Ghoul isn't that great a movie (fight scenes are good; some central plot points are skipped over, in way that makes me wonder if it was cut to get it only a PG12, when the story really requires a PG15) but he is amazing in it.
FIRST LOVE is an amazing movie, but he doesn't do much in it other than be cute and have abs. He does do each of those very well, but it's Becky and SOMETANI Shota's – actually all the supporting character's – show, with the central couple acting as the straight people to the circus they've found themselves in.
I do understand that none of those are going to be your thing if you're looking for some romanic comedy without a lot of blood-spilling, but I understand he has been in those, too. ?