Kindly identify and explain in detail 2 key issues that were the reason for the Japan Endaka Period 1985-1995 (in which the Japanese Yen appreciated strongly against US Dollar). Also, explain the challenges faced by Japan due to ENDAKA.

(I can identify the Widening trade deficit of the US as one of the key issues of Endaka. You can also elaborate on that, or come up with new points)

Thanks