Famous combs in Japan are made of boxwood (Tsuge-gushi). The combs are usually soaked in camellia oil to keep their shine for many years. They also prevent static electricity from developing. Also, tsuge (boxwood) kanzashi available. Jusanya in Ueno uses only Satsuma tsuge.
13-ya (Jusanya) in Tokyo (found in 1736): Taito-ku Ueno 2-12-21, They will ckeck your hair and recommend best fit comb for you.