1969年東京都出身。
群馬県桐生市に育つ。
東京藝術大学大学院美術研究科絵画専攻（油画）修士課程修了。
2001年第４回岡本太郎記念現代芸術大賞優秀賞。
2013年自著『ヘンな日本美術史』で第12回小林秀雄賞。
2015年2月～5月には「山口晃展 前に下がる 下を仰ぐ」を水戸芸術館現代美術ギャラリー（茨城）で開催、7月17日～9月23日まで鹿児島県霧島アートの森にて個展『汽車とかたな』を開催予定。
合戦図、時空の混在、更には画面を埋め尽くすように描き込まれた街の鳥瞰図等のモティーフを使い、観客を飽きさせないユーモアとシニカルさを織り交ぜた作風で知られる。

Born in Tokyo in 1969 and grown up in Kiryu City, Gunma.
Graduated from Tokyo National University of Fine Arts and Music, MA in Oil Painting. Won the Runner-up Prize The 4th Taro Okamoto Memorial Award for Contemporary Art in 2001 and The 12th KOBAYASHI Hideo Award for his book "Hen na Nihon Bijutsushi" in 2013. Held the solo -exhibition [YAMAGUCHI Akira: Stepping Back to Seek the Underneath], Contemporary Art Gallery, Art Tower Mito, Ibaraki, February to May, 2015.
And he is going to have a solo exhibition "Kisha to Katana (meaning: steam Train and Sword)" at KIRISHIMA OPEN-AIR MUSEUM from Jul. 17 to Sep. 23.Battle scenes, mixed space-time, and bird's-eye views that are motif.
He is known for a style that contains humor and a cynical viewpoint, with which he has never bored the viewers.

ONBEAT掲載号：vol.03