Making Japan state pension back payments

[Tkydon]

Just discovered I have 2 pension books! No idea how that happened, but the pension numbers and issue dates are different on each. My name and date of birth are correct on both, but obviously I should only have 1 pension book. I think there must’ve been some clerical error by the pension guys at some point, possibly related to my changing jobs and company some years ago. At any rate, I hope the book with the earlier issue date is the correct one, which would give me another 6mths or so. I’ll be able to line it up with the number of months contributions stated in my most recent, annual pension contribution statement. Anyone else have a 2 pension book experience and, if so, did you need to take any action?

You should go to the Local Pension Office and consolidate them.