![2girls 5boys belt black_hair blonde_hair boots brother_and_sister brown_hair ebira endou_izuna endou_shizuna formal glasses hair_ornament hairclip hayase_kouichi hind-kind kizaki_emi kurogane_no_linebarrel linebarrel md5_mismatch mecha moritsugu_reiji multiple_boys multiple_girls necktie robe sandals siblings skirt suit talisman_(mecha) thighhighs twins vardant yamashita_satoru rating:s score:3 2girls 5boys belt black_hair blonde_hair boots brother_and_sister brown_hair ebira endou_izuna endou_shizuna formal glasses hair_ornament hairclip hayase_kouichi hind-kind kizaki_emi kurogane_no_linebarrel linebarrel md5_mismatch mecha moritsugu_reiji multiple_boys multiple_girls necktie robe sandals siblings skirt suit talisman_(mecha) thighhighs twins vardant yamashita_satoru](/cdn_image/preview/fa/72/fa72d88afa99f57777990d721dc93c9c.jpg)
A male character of Kurogane no Linebarrel.
In the manga he is introduced using the Japanese pronoun for 'he' which is, 'kare' appears in Hiragana next to the kanji for 'he' or 'him'; "そして彼が (Soshite kare ga) Yamashita Satoru-kun da." This can be found in the original Japanese manga, Volume 2, page 86. Additionally, "Satoru" is traditionally a masculine name in Japan.
The Wikipedia article (in the Manga/Anime ring) does refer to Yamashita as a girl. However, this mistake was based on an English scanlation of the manga that has proliferated on the Internet. (Info taken from Myanimelist.net)