Indicates that while one action is happening, another action or situation is simultaneously occurring or is in contrast.
Verbal Noun (Verb Stem) + 一方だ, Verb Stem + 一方, い-Adjective + 一方, な-Adjective + である一方
Long explanation:
The ~一方 grammar point is used to express that while one action is taking place, another action or situation is also occurring or is in contrast to the first action. The actions or situations referred to usually occur simultaneously or show different tendencies, increasing or decreasing.