(mahjong) red dragon (tile)

御中: belly, tummy, stomach, abdomen; a meal, especially of rice; cotton batting; (historical) the title of a maid working in the inner part of a samurai family's house during the Muromachi period

middle / in

middle / inside / in

a wristwatch

(biology, anatomy) a tentacle: specifically, either of the two tentacles of a squid or cuttlefish that are longer than the other eight (technically called “arms”)

having confidence in one's skill; confident that one has the skill

(idiomatic, usually cooking) to display one's ability

arm wrestling

using someone's arm as a pillow