www.cites.org/common/com/SC/49/E49-Inf%202.doc
This is dated 2003.. Might be outdated but it covers all import and export of ivory into and out of Japan.
FedEx Reads like this:
Japanese Law prohibits the following goods from being imported:
*Opium, ether narcotic drugs and utensils for opium smoking, and stimulants (including Vicks Inhalers and Sudafed), psychotropic substances (excluding those designated by an ordinance of the Ministry of Health and Welfare)
*Counterfeit, altered, or imitated articles of coins, paper money, banknotes, or securities
*Books, drawings, carvings, and any other article which injures public security or morals (obscene or immoral materials, i.e. pornography),
*Articles which infringe upon rights in patents, utility-models, designs, trademarks, copyright, neighboring rights, or layout- design of integrated circuits
*Botulinum Toxin A (over 500 units per vial) and Toxin B (over 10000 units per vial) are prohibited
* Firearms (pistols, rifles, machine guns, etc.),ammunition (bullets) thereof, and parts of Firearms
*
Animal Quarantine (bone, guts, horns, blood, antibody, serum, semen, feathers, raw wool, raw leather, bacteria, coliforn bacilllus)
What I am getting from all this as long as the original business that has the ivory and used the ivory has the ivory on file as to what it was used for and you can show proof IF the question comes up there will not be a problem. But remember that man can make a very good ivory substitute nowadays.