http://kso.blog.shinobi.jp/Category/10/

It looks very much like Medieval Total War 2 - a turn based strategy game. Looks like some great fun.

http://ja.wikipedia.org/wiki/%E4%BF%A1%E...9%E6%96%B0

It's a pretty popular series of games
http://en.wikipedia.org/wiki/Nobunaga%27s_Ambition