Haven’t watched Japanese drama and cry for two hours for a long time…  This is a very touching story about a girl named Aya who suffered from an incurable disease, but lived life to the fullest until her death at 25. The original story is based on the diary Aya kept writing until she could no longer hold a pen. The book that later followed entitled “One Liter of Tears" has sold over 1.1 million copies.  This drama is a adaptation of a real story which happened 20+ years ago.  Her life probably would have been easily if she would have the same disorder disease now.
Here is the link to the official site: http://www.fujitv.co.jp/tears/index2.html