Hayagriva Kannon Okinawa Paper Prayer Offering World War Two Era?

In Japanese Hayagriva is considered a form of Avalokiteśvara with wrathful form (Batō Kannon 馬頭觀音, lit. Hayagrīva-Avalokiteśvara/ Horse Head Avalokiteśvara) , one of the six Avalokiteśvaras intended to save the sentient beings of the six realms: deities (deva), demigods (asura), human beings, animals, hungry ghosts, beings of hell. Hayagriva's sphere is realm of animals (or beings whose state of mind are animal-like). In Folk religion in Japan, Hayagriva was also worshipped as the guardian deity for horses because of its name Horse-head (Batō). The horse was symbolized as a vehicle, not as one of Hayagriva's heads.