Hokko Life

Not too difficult but time consuming.

You will need to have found the fisherman and cleaned up the pond to get this achievement.

Derris is found at the Grove - the first left up the hill. You will need to place a bridge to get there. Clean up the grove area and he will give you a rod and subsequently relocate to the Beach area.

Every 10 days he will give you a challenge. From my experience, they are either to catch 5 fish in 5 minutes or 10 fish in 10 minutes. I never had a problem getting the required fish right there on the beach and there was never a requirement to catch a specific type of fish.

You should make some progress towards Master Fisher.

Following Rossco7530's guide I approached Derris (the fisherman NPC bear) every 10 days and tried to get the 5 fish in 5 minutes, instead of 10 fish in 10 minutes to save time in the long run.

Now every time I got 10 fish in 10 minutes I simply started the challenge and just walked away not caring about it, but the challenge timer at the top still followed me along. I ignored it and went straight to sleep in order to skip the day and the challenge entirely.

At a certain point I completed around 6 challenges with 5 fish in 5 minutes and wanted to skip yet another challenge. After waking up the achievement popped straight away, which could mean that skipping a challenge also counts towards it.

TL:DR Starting a challenge and then skipping it by sleeping until tomorrow did count towards the achievement for me.