The yen strengthened sharply in the foreign exchange market on the 7th, briefly reaching the ¥156-per-dollar range. It had been trading in the ¥158-per-dollar range until around 9:30 p.m., but then moved toward yen appreciation over a short period.
The yen made a sharp move over a short period in the foreign exchange market on the 7th, briefly reaching the ¥156-per-dollar range. The yen therefore moved rapidly toward appreciation.
According to the article, it briefly strengthened to the ¥156-per-dollar range from the ¥158-per-dollar level where it had been trading shortly after 9:30 p.m.