Create a mood board centered around the concept of 'Japanese gem jewelry.' The board should feature numerous small squares, each highlighting a different aspect. Some of these squares could showcase intricate pieces of Japanese gem jewelry, like jadeite bangles, pearl earrings, cherry blossom-inspired brooches adorned with colored gemstones, and necklaces with gem-encrusted koi fish pendants. Others could display the raw gems commonly used in Japanese jewelry, such as pearls, jade, and diamonds. You can also include squares featuring traditional Japanese motifs and patterns that often influence the design of these gem pieces.