An environmental group has criticized Japan's controls over its ivory supply.
A report released with the support of the World Wildlife Fund this month said ivory exports are hurting efforts to end trafficking in elephant tusks.
The report's researchers found that antique dealers are buying a large number of elephant tusks in Japan. These tusks, however, are not legally registered.
The report said that sellers advertised whole tusks without proof of where they came from. It said internet sites sell hundreds of ivory objects each year. Often the sales are to visitors from other Asian countries such as China.
The report used information from TRAFFIC, a network that studies the wildlife trade. TRAFFIC found that sellers used a major website to sell about 2,447 ivory items in a four-week period from May to June of 2017. The ivory items were valued at more than $400,000.
The report's authors urged that the government should bring attention to rules for ivory dealings. They also urged the government to tighten controls at customs to keep people from taking items such as ivory seals and figurines out of the country.
The Convention on International Trade in Endangered Species of Wild Fauna and Flora, or CITES, bans international trade in ivory. The ban is meant to protect endangered African elephants.
CITES also has called for closing ivory markets in all member states.
Many countries have agreed to close their ivory markets.
But Japan has resisted closing its markets. It argues that ivory products traded inside the country are not received through illegal hunting or trading.
Instead, the government approved a proposal to tighten registration requirements for more than 8,000 ivory sellers and manufacturers.
Critics say the registration system amounts to a form of ivory laundering. Laundering refers to the act of making money or goods legal after they have been acquired illegally.
The large internet company Rakuten said it would ban sales of ivory objects in its online marketplace. It also banned sales of products using parts of sea turtles.
I'm John Russell.