noun
savings bond
A bond issued to encourage saving, typically by a government or postal system.
戦後、政府は貯蓄債券を発行して国民の貯蓄を促した。
After the war, the government issued savings bonds to encourage citizens to save.
国債 is a general government bond, while 貯蓄債券 specifically refers to bonds aimed at promoting personal savings.
Compound of 貯蓄 (savings) and 債券 (bond).