公債

1. Origins, structure, and basic meaning

• Structure: 公債 (こうさい) is a noun for a bond issued by a government or public body to raise funds.
• Basic usage: 公債を発行する makes the bonds issued to finance public works the object, while 公債の償還期限 specifies the repayment deadline checked by an investor.

2. Common pitfalls and similar expressions

• Issuance and redemption
  • The government is the issuer in 公債を発行する, while an investor checks 公債の償還期限. The issue date should not be confused with the maturity at which funds are repaid.