By using the Horse Flute (馬笛 Umafue?) the wielder is able to call the Mōnshin from their nest and control them for whatever purpose they wish.
Appearance
A small flute attached with beads.
Plot
Palace Invasion Arc
After being order by Lord Tensen to capture another group of humans that recently made landfall on Kotaku, a Dōshi used the flute to order the Mōnshin to ambush them. The flute was later kept in the hands of Yamada Asaemon Shugen after the party defeated both the Mōnshin and the Dōshi. To quicken their paste to Hōrai, Shugen summoned a horde of Mōnshin from their nest using the flute to have them carry the Yamada Asaemon.