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Kokumin Nenkin (National Pension) Calculator Knowledge Check

Sharpen your kokumin nenkin (national pension) calculator skills with algorithmically generated problems. Each attempt produces unique values to test your formula knowledge.

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If you had 84 months of fully approved contribution exemption (where you paid 0 yen) and 228 months of full payments, how many 'effective full contribution months' will be used to calculate your pension? (Note: Fully exempted months since April 2009 count as 1/2 of a paid month towards your pension!)

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