If you can stay within the Ideal Tension Zone while fishing, this rod will shorten the time in which fish will struggle by a stable amount and increase your chances of success. This effect only works in Inazuma.
How to Get Narukawa Ukai?
You can purchase this fishing rod from Kujirai Momiji in Narukami Island, Inazuma.
Here’s all fish you need to buy Narukawa Ukai: