1
firing line;position where one is subject to questioning, criticism, etc.
See also:
矢面に立つ (やおもてにたつ)
議長が批判の矢面に立った。
The brunt of criticism was borne by the chairmen.
2
in front of a flying arrow (fired by the enemy)
orig. meaning
Other forms
矢表 【やおもて】