Retirement resources are not all immediately spendable

A fictional household in Japan expects retirement next year. For a simplified first-year budget, net pension receipts are two million four hundred thousand yen and spending is three million six hundred thousand yen. Liquid savings are six million yen. The household also owns its home and holds retirement-account assets, but has not confirmed withdrawal conditions. The couple proposes counting the full home valuation as cash and assuming their pension estimate is a guaranteed net amount forever. For the arithmetic task, take the stated net receipts and spending as fixed and ignore investment returns, inflation, tax changes, emergencies, and future benefit adjustments. For the planning task, do not ignore those uncertainties: consider coverage records, the estimate’s assumptions, retirement-account access, longevity, and what happens if one partner dies. A scenario model should reveal these differences rather than promise that one simple division establishes lifetime security.