Oguri Shun, Haruma Miura, Kamenashi Kazuya, Mizushima Hiro, MatsuJun, and Narimiya Hiroki. Also although I haven't seen much of Kaito Seishiro...I just love that kid for being able to act at a such young age!
Definitely Matsuyama Kenichi. I really like Oguri Shun, Hongo Kanata, Mizushima Hiro and Narimiya Hiroki as well. And Nishijima Takahiro is hilarious.
Matsumoto Jun - Not only has he played a range of characters: he's played them brilliantly 8D

Mizushima Hiro - He's a solid actor. No matter the role he plays, he's extremely grounded and conforms the character to himself :)

Narimiya Hiroki - Ahhh... May I take a moment to just say that I may be in love with this man? He loses himself in a character and I lose myself in him *_*
This is very difficult... but off the top of my head, I'd go with these three:

Matsujun, because he is perfect all the time, and got me addicted to JDramas.
Eita, because he always has unique roles and is extremely good looking.
Nagase Tomoya, because he is hilarious and also extremely good looking!
My favourite Japanese actor is Satoshi Tsumabuki, first i fell for him when i're watching Haru no Yuki (Snowy Love Falling in Spring) & Nada Sou Sou (Tears for You). What a great actor! He acts greatly!
He was in Great Teacher Onizuka & cameo in Tokyo Drift: Fast & Furious (3).
YamaPi - who is the most brilliant in Nobuta wo Produce...It's like he's not acting, but improvising all the time in the drama.
Matsumoto Jun - love all his roles, started with Hana Yori Dango
Shun Oguri - One of my first favourite actors, love him since Hana Kimi, the best of all as an actor, I think
Toma Ikuta - Again, love him since Hana Kimi, recently watched Maou, brilliant
Kazuya Kamenashi - here I'm soooo no objecitve :) He;s brilliant for me in everything he does, either singing or acting...:)
Kenishi Matsuyama - fell in love with him after watching Death Note, love his acting since then
Tamaki Hiroshi - though I haven't watched many movies with him, just Taada Kimi wo Aishiteru and Nodame Cantabile, these are enough for me, to like him
Masaki Okada - loved his acting in Boku no Hatsukoi Kimi ni Sasagu and Otomen :)
Though there is more, I'll shut up :P
Definitely Miura Haruma !
Matsumoto Juuuuuuuuuuuuuuuuuuuuuuuuuuuuuun <3 <3 <3 <3 <3

he shall forever be the most loved in my heart.
kame, yamapi and kanata hongo ♥_♥


Koike Teppei from "Lovely Complex"! His character is so cute and funny, and I think overall he's an adorable boy.
I also felt like I should attach his photo, since he's so cute... In fact, from now on when I post something about a favorite actor/actress, I'll be sure to include their photo. :P


Him dressed as a maid... Apparently it's for his role in an episode of "Shibatora". I've never heard of it, but it sounds interesting.
I have so much-in no particular order
Abe Hiroshi
Nagase Tomoya
Ikuta Toma
Kento Kaku
Fujiki Naohito
Akanishi Jin
Miura Haruma
Yamapi
MatsuJun
Keinchi Matsuyama
Tamaki Hiroshi
Sato Takeru
Tatsuya Fujiwara and Ohno Satoshi.. Most of my other favs have been named before but these two really need there props. I found Tatsuya first watching Battle Royale, which I love death game movies and Ohno Satoshi I don't think you can mention without thinking of Maou. <3
Yamashita Tomohisa: I'm bias, I loved him since forever (wonderful singer and actor)
Narimiya Hiroki: Loved how versatile he is as an actor (love him in Bloody Monday and Yankee-kun to Megane-Chan)
Akanishi Jin He is the cutest actor ever~
Started to like him in Gokusen
He is such a Baka..lol...in cute way.
not only he can acts..he can also sings :)
Shirota Yuu
I don't know why. I just love him.

I also love Fukuyama Masaharu and Kamikawa Takaya
Both are old enough to be my dad, but... *swoon*

(But one of the greatest Japanese actors without a doubt is the last Mifune Toshiro. Outstanding actor, and handsome too =p)