Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | Original channel | Role | Note |
| --- | --- | --- | --- | --- |
| 2003.0 | Yankee Bokou ni Kaeru | TBS | Noriyuki Takahashi | Co-star |
| 2005.0 | Hana Yori Dango | TBS | Sojiro Nishikado | Supporting |
| 2006.0 | Regatta | TV Asahi | Seiya Yagi | Supporting |
| 2006.0 | Top Caster | Fuji TV | Shunpei Iga | Supporting |
| 2006.0 | Aru Ai no Uta | TBS | Takumi Nanase | Co-star |
| 2007.0 | Jotei | TV Asahi | Date Naoto | Co-star |
| 2007.0 | Liar Game | Fuji TV | Akiyama Shinichi | Co-star |
| 2007.0 | Hana Yori Dango 2 | TBS | Sojiro Nishikado | Supporting |
| 2008.0 | Bara no nai Hanaya | Fuji TV | Naoya Kudo | Supporting |
| 2008.0 | Rokumeikan | TV Asahi | Hisao Kiyohara | Supporting |
| 2008.0 | Atsuhime | NHK | Tokugawa Iemochi | Supporting |
| 2009.0 | Meitantei no Okite | TV Asahi | Daigoro Tenkaichi | Lead role |
| 2009.0 | Love Shuffle | TBS | Ojiro Sera | Supporting |
| 2009.0 | Liar Game 2 | Fuji TV | Shinichi Akiyama | Co-star |
| 2010.0 | Tsuki no Koibito | Fuji TV | Kazami Sai | Supporting |
| 2010.0 | Nagareboshi | Fuji TV | Ryo Kamiya | Supporting |
| 2011.0 | Don Quixote | NTV | Masataka Shirota | Lead role |
| 2012.0 | Taira no Kiyomori | NHK | Emperor Go-Shirakawa | Co-star |
| 2013.0 | Sennyû Tantei Tokage | TBS | Oribe Toru | Lead role |
Question:
what is the original channel when the note is co-star in year 2012?
Answer:
NHK