Minimalism is often considered one of the hardest styles to pull off. While I think it isn't necessarily more difficult than any other style or genres, the risk of failing is much greater. When going for a minimalist style a director has very little to fall back on. All parts of the film have to work perfectly together to get the emotions across. When even just one of these elements fails the film crumbles and all that's left is a sense of tediousness and boredom.
Su-ki-da offers the viewer very little in the sense of amusement. Ishikawa follows two characters and their exploration of the feelings they have for each other. The first part of the film tracks them down when they are still in high school, the second part of the film plays 17 years later when they are finally reunited. The focus of the film is very narrow, with very few secondary characters and many of the film's core scenes documenting what happens when the two lovers are together.