Dramas with stunning cinematography

God's Gift 14 Days! :D 

Garasu no Ashi
xxxHolic
River's Edge
Long Goodbye
Nigeru Onna
Ishi no Mayu

Not a drama, but a movie:
Bleak Night

Pluto and Sayonara Kabukicho also had pretty good cinematography, though Bleak Night came to mind immediately when you mentioned this.

As far as dramas go:
Cruel City
Boku no Yabai Tsuma
W has impressed me a lot with the cinematography so far.

And to a lesser extent

Hanzawa Naoki
Signal
Zeni Geba (a little more understated, but there were a couple of scenes here that really stood out)

That Winter, The Wind Blows. I didn't love this drama but if cinematography is what you're looking for, you can check this one.

If you liked White Christmas for that reason, it's probably Kim Yong Soo's directorial style that you like too.

You might try some of his other dramas and drama specials, even though they're a little hit or miss.  But they are often really, really pretty to look at.  

Check the list here at dramawiki: http://wiki.d-addicts.com/Kim_Yong_Soo

I would recommend Babysitter as the best of the rest overall.  It's also short, so maybe you can confirm my suspicions.  Or try one of the single-ep ones.  I liked the second ep of Hometown Legends that he directed a lot (actually both were pretty good anyway: eps 4 and 7 of the 2008 season), and I love The Scary One, the Ghost and I (although it might just be me, haha).

Equator Man is also not bad, other than the female lead not having anything to do for a while.

For other, non-Kim Yong Soo things, I would also say Chuno was very pretty.

Nazo no Tenkousei
LIQUID - Oni no Sake, Kiseki no Kura
Osozaki no Himawari
Nankyoku Tairiku
Fuben na Benriya
Crying out Love, in the Center of the World
Love That Makes You Cry
Flowers for Algernon

Not a Drama but Hot Road is quite visually pleasing. Fantastic OST too. ;)