Hello! I'm currently looking for sad, heartbreaking movies. Recently watched the Korean movie, Heartless, and it made me want to watch more movies of the same genre. A movie that will make

Here are some of the similar movies I've watched:

Confessions

Saigo no Yakusoku

200 Pounds Beauty

As One

The Flu

The Five

Tabloid Truth

Seven Days

The World of Silence

Blind

Harmony

Hello Ghost

Helpless

A Werewolf Boy

Miracle in Cell No. 7

My Piano

My Paparotti

Old Boy

Perfect Number

*placed emphasis on those I've really really liked

Give me some recommendations please! Any movie that will make me feel sad, or think about the real world after watching some saddening things in the movie. Any country too.

Thanks!

nanjing nanjing aka city of life and death
nobody knows
Try Classic if you want something about romantic relationships
Tada, Kimi wo Aishiteru

A Moment to Remember

Always

The Last Blossom
More than Blue
Rockin' on Heaven's Door 
Han Gong Ju
Another family
Bokura Ga Ita (zenpen/kouhen)
Eien no zero
Windstruck. My ultime fave. Never fails to make me cry everytime I watch it. 
Millionaire's First Love
K-movie - Hope (based on true events)

http://www.mydramalist.com/7431-hope

I also 2nd Chinese movie Nanjing Nanjing