== Pop culture == 

 Well it should be expanded: include drama, song, novel, past major manga works and so on. But besides that, on the current article. What means "the third party"? All three works are sold as "shogi manga" by their publishers (so advertized, in another word). Is it not enough? 

 Just for information, JSA picked up 81divers, 3gatsu no lion and "55 no ryu" (a manga classics) in one article http://www.shogi.or.jp/topics/2011/08/716i.html as "shogi manga". Not known if you are satisfied. "Shion no O" is a shogi manga defintely but its script writer Masaru Katori aka Naoko Hayashiba ex-female shogi player had a series of trouble with JSA, I wouldn't expect they refer to it favorably.