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Is there any rate better than that?
You're getting charged higher rates for the usage of the registrar's local address in most cases. .jp names require an address in Japan. If you don't have one, then you have to rely on the registrar to lend you theirs.
Check out a few of the Japan based registrars from the ICANN-Accredited Registrars list [icann.org]. That should have a few with lower prices than you mentioned.
Here is the list of accredited registrars on the Japan Registry Services [jpshop.jp] site. That page is in Japanese though.