The act of piling goods on top; cargo loaded on the upper deck (deck cargo).
貨物は上積みと下積みに分けて保管された。
The cargo was stored separated into top-loaded and bottom-loaded items.
船の上積みに重いコンテナを載せる際は注意が必要だ。
Care is needed when placing heavy containers on the ship's upper deck.
An additional amount added on top of something; an increase or extra allocation (e.g., extra budget).
プロジェクトの予算に上積みが認められた。
An additional allocation was approved for the project's budget.
年末のボーナスに上積みがあると社員に伝えられた。
Employees were told there would be an extra amount added to the year-end bonus.
売上が好調だったため、上積み分を設備投資に回すことにした。
Because sales were strong, the extra funds were allocated to capital investments.