Kamenashi Kazuya aka kame oguri shun but now I I've Hiroshi tamaki 

There's a lot:)

Kubota Masataka, Matsuzaka Tori, Tsumabuki Satoshi, Sato Takeru, Sakai Masato , Kora Kengo, Oguri  Shun, Nishikido Ryo, Yamamoto Yusuke, Takahasi Issei, Eita,  Matsuyama Kenichi, Sakaguchi Kentaro

And Iately these 3 are growing on me: Odigiri Joe, Matsuda Ryuhei, and Hoshino Gen

Right now my #1 favorite Japanese actor is Kubota Masataka.

He's incredibly versatile. He picks very different roles and is capable of really transforming himself.

His career improved a lot after "N no tame ni" (won several awards, including Best Drama of the Year) so he's been extremely active. I actually feel he should be more picky about his projects nowadays.

What I hope/wish for him now is that he's cast as a the lead in a high-profile romance drama. He would make a great romance hero.

Miura Haruma and Kubota Masataka are my ALL TIME favorite actors. (I honestly can't pick one, I absolutely love and admire both of them.)

I also love Nishikido Ryo,  Oguri Shun, Suda Masaki and Matsuda Shota.

Matsujun, Matsuda Shota, Yamazaki Kento, Sato Takeru, Oguri Shun, Ninomiya Kazunari.

Go Ayano, Masaki Suda, Joe Odagiri, Tadanobu Asano, Sato Takeru, Eita, Ken'ichi Matsuyama ...

Matsuda Shota definitely 

Furukawa Yuki is my all-time favourite<3
I also really like Karina.

Nakajima Yuto

Sakaguchi Kentaro

Yamazaki Kento

Oguri Shun, Matsuzaka Tori, Nakagawa Taishi, Miura Haruma, and Shiraishi Shunya.

Sakai Masato without any doubt at all. His acting in Hanzawa Naoki & Legal High totally carried both shows and he is probably the single reason why both of these shows are in my Top 5 favorites. 

wow just did a marathon of legal high and i was hooked i think Sakai Masato is my third favorite such a good actor love his acting

Matsuzaka Tori, Miura Haruma, Iwata Takanori, Lee Min Ki, and Kang Ha Neul.