monkey bars; horizontal ladder
length of a blade (sword, knife, etc.); walking on the edge of a sword
roofed corridor connecting two buildings (in traditional palatial-style architecture)
common raven (Corvus corax)
swimming crab (Portunus trituberculatus); Japanese blue crab
Asplenium antiquum (species of spleenwort)
hart's-tongue fern (Asplenium scolopendrium)