(weaponry) hidden/concealed weapons

secret camera; hidden camera

rising of the curtain of a stage, the beginning of a performance / opening of a ceremony, festivity or conference

for a performance to begin / for some event to open, begin

A small pillow that is tied under the obi at the back which gives the obi musabi or "knot" its volume.

curtain, banner

horizontal banner

black curtain / éminence grise (a secret or unofficial decision-maker; the power behind the throne)

dakimakura (type of body-length pillow)

myself, oneself