[kosan]

First of all what is your age?
If you are young then there are many oppertunity to grow.

Politics
Politics happen in every company. You see the dog, you see the fox and you see the wolf. You change another company it still exsit

Pay
Please consider your annual income rather than monthly income. You may have enough basic to survive monthly but you may have very big bonus e.g. 6 to 12mths.

Convinence
What is the time taken for travelling to work place.

Nature of Job
Need more detail before any advice is given.