Question: Which institution that serves as a bank for central banks was directed by Yasuo Matsushita?

Context paragraphs:
Bank for International Settlements: The Bank for International Settlements (BIS) is an international financial institution owned by central banks which "fosters international monetary and financial cooperation and serves as a bank for central banks".

International Journal of Central Banking: The International Journal of Central Banking (IJCB) is an economic research journal which began in the 2004 decision of several Central Banks to create a professional journal for policymakers and researchers in the field of monetary policy.  In July 2004, the Bank for International Settlements (BIS), the European Central Bank, and each of the Group of Ten (G-10) central banks announced their plans to support the development of a new publication focused on central bank theory and practice.  Other central banks were invited to participate in this joint project, and there are now some 50 sponsoring institutions.

De Nederlandsche Bank: De Nederlandsche Bank (DNB, "The Dutch Bank", sometimes misdescribed as the "Dutch National Bank" to fit the acronym in English) is the central bank of the Netherlands.  It is part of the European System of Central Banks (ESCB).  De Nederlandsche Bank (DNB) is a public limited company (Dutch: naamloze vennootschap) whose every day policy is overseen by the Governing Board.  Being an NV, DNB has a Supervisory Board (Dutch Raad van Commissarissen).  In addition, there is an advisory body called the Bank Council (Dutch Bankraad).  As a public entity the DNB has a function as both part of the European System of Central Banks (ESCB) and an independent public body (zelfstandig bestuursorgaan).

Specimen banknote: A specimen banknote is printed generally in very limited quantities for distribution to central banks to aid in the recognition of banknotes from a country other than their own.  In some cases, specimen banknotes are printed in less limited quantities distributed to commercial banks, or even to commercial enterprises and the public at large in order to familiarize users about new designs.  In addition, specimen banknotes are sold in some countries to collectors (often in special commemorative folders or albums).  They have also been distributed by banknote printers (such as the American Bank Note Company) as examples of their craftsmanship.  Occasionally, specimen banknotes are distributed as gifts to dignitaries or to employees of central banks, often in special presentation albums.

Bank reserves: Bank reserves are a commercial banks' holdings of deposits in accounts with a central bank (for instance the European Central Bank or the applicable branch bank of the Federal Reserve System, in the latter case including federal funds), plus currency that is physically held in the bank's vault ("vault cash").  Some central banks set minimum reserve requirements, which require banks to hold deposits at the central bank equivalent to at least a specified percentage of their liabilities such as customer deposits.  Even when there are no reserve requirements, banks often opt to hold some reserves—called desired reserves—against unexpected events such as unusually large net withdrawals by customers or bank runs.

Central bank: A central bank, reserve bank, or monetary authority is an institution that manages a state's currency, money supply, and interest rates. Central banks also usually oversee the commercial banking system of their respective countries.  In contrast to a commercial bank, a central bank possesses a monopoly on increasing the monetary base in the state, and usually also prints the national currency, which usually serves as the state's legal tender.  Central banks also act as a "lender of last resort" to the banking sector during times of financial crisis.  Most central banks usually also have supervisory and regulatory powers to ensure the solvency of member institutions, prevent bank runs, and prevent reckless or fraudulent behavior by member banks.

Reichsbank: The    was the central bank of Germany from 1876 until 1945.  It was founded on 1 January 1876 (shortly after the establishment of the German Empire in 1871).  The Reichsbank was a privately owned central bank of Prussia, under close control by the Reich government.  Its first president was Hermann von Dechend.  Before unification in 1871, Germany had 31 central banks – the Notenbanken (note banks).  Each of the independent states issued their own money.  In 1870, a law was passed that forbade the formation of further central banks.  In 1874, a draft banking law was introduced in the Reichstag (the German parliament).  After several changes and compromises, the law was passed in 1875.  Despite the creation of the Reichsbank, however, four of the "Notenbanken" – Baden, Bavaria, Saxony and Württemberg – continued to exist until 1914.

Yasuo Matsushita: Yasuo Matsushita (松下 康雄 , Matsushita Yasuo , January 1, 1926 –) was a Japanese businessman, central banker, the 27th Governor of the Bank of Japan (BOJ) and a Director of the Bank for International Settlements (BIS).

European Central Bank: The European Central Bank (ECB; German: "Europäische Zentralbank (EZB)", French: "Banque centrale européenne (BCE)") is the central bank for the euro and administers monetary policy of the eurozone, which consists of 19 EU member states and is one of the largest currency areas in the world.  It is one of the world's most important central banks and is one of the seven institutions of the European Union (EU) listed in the Treaty on European Union (TEU).  The capital stock of the bank is owned by the central banks of all 28 EU member states.  The Treaty of Amsterdam established the bank in 1998, and it is headquartered in Frankfurt, Germany.  s of 2015 the President of the ECB is Mario Draghi, former governor of the Bank of Italy, former member of the World Bank, and former managing director of the Goldman Sachs international division (2002–2005).  The bank primarily occupied the Eurotower prior to, and during, the construction of the new headquarters.

Kjell G. Nyborg: Kjell G. Nyborg is a financial economist.  Since 2009, he has been a Chaired Professor of Finance at the University of Zurich, Department of Banking and Finance, where he is currently also Vice Director.  In addition, he is a Senior Chair of the Swiss Finance Institute (SFI), a Research Fellow of the Centre for Economic Policy Research (CEPR), and a Fellow of the Royal Society of Arts.  Nyborg is the President of the European Finance Association for 2017 as well as a former Director and Vice President.  He has worked on a broad range of topics.  The focus in his more recent work is on the role of money, liquidity, and collateral in Financial markets.  He has also written extensively on financial auctions and Corporate Finance.  His book "Collateral Frameworks: The Open Secret of Central Banks" on Cambridge University Press (2017) lays bare the "hidden" workings and practices of central banks.  In the book he argues that more focus should be placed on central bank collateral policy as an important and integral component of monetary policy.

Supporting paragraphs: Yasuo Matsushita Bank for International Settlements
Answer: Bank for International Settlements