bruxism / gnashing one's teeth out of anger etc.

grind one's teeth during one's sleep / gnash one's teeth out of anger etc.

hagi no tsuki, a Sendai specialty

ohagi

staggered shelves (two shelves at different heights, each one extending from one wall while not touching the other wall, but mutually joined in the middle with a vertical segment)

skinning an animal (especially a horse) while it is still alive

Japanese clover

bokken (a wooden sword used for training)

(botany) fir tree.

shrub