Yamazaki is a spy, whose specialty is naturally gathering intelligence. Yamazaki is often caught by Hijikata playing badminton by himself, and he is subsequently beaten. He is often seen cosplaying as a badminton-playing version of Echizen Ryoma from The Prince of Tennis. In episode 62 he was caught saying "Mada mada dane", which is Ryoma Echizen's catchphrase.
His role as a ninja is roughly based on Yamazaki Susumu, but is never really exercised besides one unsuccessful attempt to spy on Gintoki. Despite having a rivalry with Shinpachi, they most often see eye-to-eye out of their respective groups.
Despite his lack of screen time, he came in 9th in the Gintama character popularity poll. But even with his popularity, Sorachi has clearly stated that he will never be on a cover of a Gintama volume.
Yamazaki's birthday is February 6. He is 169 cm, and he weighs 58 kg. His age has not yet been revealed.
His name is based on the historical Yamazaki Susumu.
Related anime:Gintama: Nanigoto mo Saisho ga Kanjin'nanode Tashou Senobi suru Kurai ga Choudo yoi Other, 2005
Gintama TV, 2006
Gintama: Dai Hanseikai Other, 2010
Gintama: The Movie Movie, 2010
Gintama (Episodes 202-252) TV, 2011
Yorinuki Gintama-san on Theater 2D Movie, 2012
Gintama (Episodes 253-265) TV, 2012
Gekijouban Gintama Kanketsuhen: Yorozuya yo Eien Nare Movie, 2013
Gintama: Jump Festa Anime Tour 2014 Other, 2014
Gintama (Episodes 266-316) TV, 2015
Related manga:Dandelion Manga, 2002
Gin Tama Manga, 2003