Below is a three month price history chart comparing the stock performance of SMBC, versus FNFG.

FORBES: SMBC Makes Bullish Cross Above Critical Moving Average

"Investors were worried that finance ministers would criticise the recent weakness in the yen, " said Hiroichi Nishi of SMBC Nikko Securities.

BBC: North Korea nuclear test: Asian stock markets mixed

"Stocks must account for a few sessions of most positive activity in overseas markets, which have resulted in a sharply weaker yen, all of which will be tonic for buying, " said Hiroichi Nishi from SMBC Nikko Securities.

BBC: Japan's Nikkei tops 14,000 for first time since 2008