*updated with translation*
This was posted on the Japanese homepage:
Hello, everyone in Japan! This is Lee Seung Gi. [in Japanese]
This is my first greeting in the new year, 2013.
Thanks to all of you, last year ended on a beautiful and heartwarming note.
I’ve had a lot of activities in Korea, and couldn’t go to Japan very often.
I always feel sorry to the fans in Japan.
But I’ll never forget… I’m always thinking about the fans in Japan,
so please keep supporting me.
In 2013, I hope we’ll be together with the same love as in 2012.
Thank you to everyone in Japan!
I’ll meet you through ‘Gu Family Book’ during the 1st half of the year.
Even though its broadcast in Japan is still undecided, I think you’ll be able to watch it online.
I’ll be showing a side of me you haven’t seen before, so please look forward to it!
Happy New Year! Please be healthy!
Happy New Year! See you later! [in Japanese]
source: leeseunggi.jp
English translation: tryp96.wordpress.com
Based on Chinese translation by TAIFC Charmmy Yang
Everything Lee Seung Gi 
Eng subs please!! 😀