In the Omori game you can obtain a number of keys. These keyboard keys are labeled with a capital letter. The letter keys start with A all the way to Z. You can find the F key here.
Omori Location Key G
You can find the Omori G key inside the Snowglobe mountain igloo. Note: The G Key is Hikikomori exclusive.
Looking for Key H. Find the Omori Key H.
You can find all Omori key locations here.