In Japanese class we watched 誰も知らない (Nobody Knows) - what a crazy movie. They bury the sister in a suitcase at the airport! We've also seen おくりびと (Departures?)、電車男 Train Man 、リンダリンダリンダ Linda Linda Linda.
The best part is definitely the scenery, what a pretty movie to look at. I pretty much had reasons for hating like every single character though, rooted for all of them to die. And like many others, I feel like there were way too many unanswered questions.