Yoshifumi Nishikawa, a former chief of Sumitomo Mitsui Banking Corp. who spearheaded a major shakeup of Japan's banking sector in the early 2000s before taking the helm of the mammoth Japan Post group during its initial privatization period, has died, sources familiar with the matter said Friday. He was 82.

Nishikawa was one of Japan's most well-known bankers and had a reputation as a strong leader with bold ideas. In 2005, then Prime Minister Junichiro Koizumi selected him to oversee Japan Post's privatization process, which began two years later.

Yoshifumi Nishikawa speaks at a press conference in Tokyo in May 2008 (Kyodo)

At the time, the Japan Post group had some 240,000 employees and its banking unit was the world's largest deposit holder.

However, he resigned as president of Japan Post Holdings Co. in October 2009 when the Liberal Democratic Party's defeat in the preceding summer's general election led to a review of the privatization by the new government.

Nishikawa, a native of Nara Prefecture, joined what was then Sumitomo Bank in 1961 and became its president in 1997. At the time, the Japanese financial industry was in crisis due to widespread bad debt, with several major banks and brokerages collapsing in 1997 and 1998.

As chief of the bank that was part of the Sumitomo conglomerate, he was credited with successfully completing its merger with Sakura Bank to create SMBC in 2001. The merger proved a significant shift in the industry as Sakura was an amalgamation of Mitsui Bank and Taiyo Kobe Bank, meaning that two rival conglomerates -- Sumitomo and Mitsui -- joined forces to establish a megabank.

While at the helm of SMBC and its holding firm, Sumitomo Mitsui Financial Group Inc., Nishikawa focused on clearing the ledger of bad loans and improving its financial health by taking measures including selling 150.3 billion yen ($1.4 billion) in SMFG convertible preferred shares to U.S. investment bank Goldman Sachs Group Inc. in 2003.

File photo taken May 11, 2018, in Tokyo shows signs of major Japanese banks -- (from L) Resona Bank, MUFG Bank, Mizuho Bank and Sumitomo Mitsui Banking. (Kyodo)

Yoshifumi Nishikawa answers questions in an interview with Kyodo News in September 2007 (Kyodo)

Nishikawa resigned as president of SMBC and SMFG in 2005, but soon re-emerged as a major player in Japan's corporate world when he assumed the presidency of Japan Post Holdings in January 2006 to start preparations for the privatization.

He aimed to float Japan Post Holdings as well as its banking and insurance units as quickly as possible in order to execute the LDP's privatization drive.

However, the now-defunct Democratic Party of Japan took power and moved to freeze the planned sale of postal shares, and Nishikawa stepped down as Japan Post Holdings president in October 2009.

"There is a big difference between what I have already done, and intend to do, in the process of privatizing the Japan Post group and the new government's policy," he said at a news conference at the time.

When the LDP retook power in 2012, the government progressed the privatization plan and shares of the three postal firms were listed simultaneously on the Tokyo Stock Exchange in November 2015.

Nishikawa served as chairman of the Japanese Bankers Association twice, first in fiscal 2000 and again in fiscal 2004.