What Are Green Bonds? - Bonds With Proceeds Earmarked for Environmental Projects
Green bonds are debt instruments whose proceeds are restricted to environmental projects such as renewable energy, energy efficiency, clean transportation, and sustainable water resource management. Since the European Investment Bank (EIB) issued the world's first green bond in 2007, the market has expanded rapidly, with global issuance reaching approximately $575 billion in 2023. In Japan, the Ministry of the Environment has established Green Bond Guidelines, and domestic issuance exceeded 3 trillion yen in fiscal year 2023. Green bond yields are generally comparable to conventional bonds with equivalent credit ratings, though increasing demand has led to some issuances at slightly lower yields (the "greenium").
Green bond issuers span government agencies, local governments, financial institutions, and corporations. In Japan, the Tokyo Metropolitan Government issued its first green bond in 2017 and has continued regular issuances since then. The combination of principal safety based on issuer creditworthiness and environmental contribution makes green bonds attractive to ESG-conscious investors.
Greenwashing Risk - Identifying Superficial Environmental Claims
As the green bond market expands, concerns have grown about greenwashing - bonds labeled "green" despite having minimal actual environmental impact. The Green Bond Principles (GBP) established by the International Capital Market Association (ICMA) require transparency from issuers across four pillars: use of proceeds, project evaluation and selection process, management of proceeds, and reporting. However, these principles are not legally binding. As an investor, it is important to verify whether the issuer has obtained a Second Party Opinion (SPO) from an independent third party, whether it holds Climate Bonds Initiative (CBI) certification, and whether post-issuance impact reports are disclosed.Books on identifying greenwashing (Amazon) explain the specific points investors should watch for.
The EU adopted the European Green Bond Standard (EU GBS) in 2023, legally clarifying the definition and disclosure requirements for green bonds. Under this standard, at least 85% of proceeds must be allocated to economic activities aligned with the EU Taxonomy. As similar regulations are developed in other countries, greenwashing risk is expected to gradually diminish.
How Individual Investors Can Access Green Bonds - Using Mutual Funds and ETFs
Direct investment in green bonds typically requires high minimum amounts (often 100 million yen or more), making mutual funds and ETFs the practical access point for individual investors. In Japan, the Nomura Green Bond Fund from Nomura Asset Management is a representative product, while globally, the iShares Global Green Bond ETF (BGRN) is a popular option. These funds invest in multiple green bonds, reducing default risk from individual issuers. Considering currency risk, a practical approach is to center your allocation on yen-denominated green bond funds and choose currency-hedged products for foreign-currency-denominated funds.
Green bonds offer a way to combine environmental contribution with stable returns, making them worth including as a component of your portfolio.Books on practical ESG bond investing (Amazon) are also helpful for portfolio construction.
Next Actions for Getting Started with Green Bond Investing
If you are considering green bond investments, start by searching for green bond-related mutual funds and ETFs through your brokerage account and compare management fees, track records, and holdings. Reallocating 10% to 20% of your bond portfolio to green bond funds allows you to incorporate environmental contribution without significantly altering your risk-return profile.
For more active involvement, check for retail green bond offerings from the Tokyo Metropolitan Government or government agencies. These issuers have high credit quality and offer principal safety, making them suitable as an introduction to bond investing. Reading the impact reports published by green bond issuers lets you see exactly which environmental projects your investment is supporting.