Capital adequacy ratio requirements

In December 2010, the Basel Committee on Banking Supervision published Basel III: A global regulatory framework for more resilient banks and banking systems, which provides detailed international standards regarding capital adequacy for banks.We began implementing Basel III in phases during the fiscal year ended March 2013. Under the Basel III framework, not only are the qualitative aspects of capital strengthened beyond the previous (Basel II) capital adequacy requirements, by means such as not counting preferred equity in Common Equity Tier 1 and tightening the requirements for subordinated debt that can be included in Tier 2, but the framework also aims to strengthen the quantitative aspects of capital by raising the minimum capital adequacy ratio and introducing a number of buffers (i.e., the capital conservation buffer, the countercyclical buffer, and the buffers for G-SIBs). In December 2017, the Basel Committee published a final regulatory document regarding revisions to Basel III, and the Basel III regulations, as revised, are scheduled to be implemented in a phased manner beginning in 2022.

バーゼル銀行監督委員会は、2010年12月に、銀行の自己資本に関する国際的な基準の詳細を示す「バーゼルⅢ：より強靭な銀行および銀行システムのための世界的な規制の枠組み」を公表しました。

バーゼルⅢは、従来の自己資本規制(バーゼルⅡ)に比べ、優先株が普通株式等Tier１に算入されないことやTier２に算入可能な劣後債の要件が厳格化されるなど、資本の質的側面が強化されたことに加え、自己資本比率の最低水準の引き上げや各種バッファー(資本保全バッファー、カウンター・シクリカル・バッファー、Ｇ－ＳＩＢバッファー)の導入により、資本の量的側面の強化