The Fishing Pole is a type of tool in Harvest Moon: Back To Nature.
The Fishing Pole is an improved version of the Fishing rod. It makes it easier to catch fish, and in half the time.
To obtain this you will need to have at least 50 fish in your pond. After you have at least 50, Greg will drop by and be so impressed by your fish pond that he will give you this upgraded tool. Ensure you have at least one free spot in your rucksack and do not leave the screen before talking to Greg or you will never have another opportunity to get the pole again.