[Japanese Media: Yen Surges Overnight, Bank of Japan Conducts Exchange Rate Check] According to a report by Nikkei on September 18, the yen exchange rate saw a significant rise in the foreign exchange market from late night on the 18th to early morning on the 19th Japan time, briefly reaching the upper 156 yen range against the US dollar. The Bank of Japan conducted an 'exchange rate check,' which involves inquiring about exchange rate levels from market participants. Exchange rate checks are considered a preparatory step for foreign exchange intervention, heightening market concerns about potential yen-buying and dollar-selling interventions by the Japanese government and the Bank of Japan.