Mario Draghi had something new to worry about as he prepared for Thursday¡¯s European Central Bank policy meeting: the euro-yen exchange rate.

The yen approached a six-year low versus the shared European currency after Bank of Japan Gov. Haruhiko Kuroda surprised investors late last week by extending his record stimulus program.

Kuroda¡¯s actions jeopardize the weaker euro that analysts say Draghi needs to reflate the economy, heaping pressure on him to come up with a policy response.