USA law will allow you to divorce your husband from Japan. You will need to publish the Notice of Dissolution in a newspaper at the location of his last known residence. You will need to inquire of a Japanese Lawyer or at your local courthouse whether the process is the same in Japan. You may want to work with a USA Attorney to handle the process for you in the USA.
Your quesiton does not raise issues of US immigration law. It needs to be reposted to the California divorce lawyers.
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter,not should it be viewed as establishing an attorney client relationship of any kind.
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