Links - Some links you may find helpful or of interest.

Internal Revenue Service - Tax information, request forms.

Social Security Administration - Check your Social Security status.
Social Security Programs Throughout the World - Learn about the Japanese pension system. Click on table of contents and then "Japan" to learn about the Japanese pension system as described by the US Social Security Administration.
Register to Vote - is the most user-friendly for registering to vote, and requesting to vote, and requesting absentee ballots.