サラリーマンに成長した砂夫　大山砂夫　妖怪ウォッチアイロンビーズの図案　

アニメ第110話で初登場。大山砂夫は素直な性格のままマジメなサラリーマンに成長した砂夫。素直さがあふれる完璧なおじぎには、相手も思わず腰が低くなる（妖怪大辞典より）。むりだ城も初登場ですが、図案はもうＵＰしていました。

図案はこちら

Oyamasunao makes his first appearance in episode 110 of the anime. Oyamasunao is a member of the Heartful Clan and is a powered up version of Sunao. The honesty or frankness that exudes from this yokai will make those around him more docile.  The origin of the name is unclear. Sunao is a play on 「砂」’suna‘ which means ‘sand’ and 「素直」’sunao‘ which means ‘honest’ or ‘frank.’ The Oyama part of his name may come from the location, Oyamamori, where he appears.