Provinces/states show as numerical keys for Japan

This appears to be a regression of https://issues.civicrm.org/jira/browse/CRM-5040 (or possibly something that was never addressed, since that bug was closed without resolution).

After selecting a province or state and then coming back to that person's address, the value (state/province name) is shown in the case of U.S. or Canada addresses, but the key (or index number) is shown in the case of Japan, rather than a correct abbreviation. Did not test against other countries.

This is demonstrated on the CiviCRM test site as of 2014-07-20. Here's the contact page:

http://drupal.demo.civicrm.org/civicrm/contact/view?reset=1&cid=303

The selected state/province is "Chiba", which should be shown as text. Instead, the ISO 30166-2 numerical code "12" is shown. This is not a valid representation for Chiba prefecture.

A perusal of the civicrm_state_province table (where this information is stored) shows that all Japanese prefectures have numerical codes in the abbreviation column, so it's not just Chiba.