write + while
kaku ippou de
while; on the other hand — two facets of one topic set side by side
北海道は雪が多い一方で、沖縄はほとんど降らないんだって。
hokkaidou wa yuki ga ooi ippou de, okinawa wa hotondo furanai n datte.
Hokkaido gets a lot of snow, while Okinawa apparently barely gets any. casual
この薬は効果が高い一方で、副作用も強い。
kono kusuri wa kouka ga takai ippou de, fukusayou mo tsuyoi.
This medicine is highly effective, but on the other hand its side effects are strong too. neutral