Here is the full list of all 31 Hokko Life achievements.
Get all other achievements
Catch 20 unique types of fish
Complete your first multi ingredient recipe request
Compete in 4 fishing tournaments
Decorate your own Christmas Tree
Unlock the expansion to the farm
Complete 10 fishing challenges
Grow 16 unique Vegetables
Grow 6 unique Fruits
Redecorate the interior and exterior of a house
Create 20 designs
Catch 20 unique types of bugs
Download an item from another players online store
Travel to the city center
Create a design that uses at least 1 piece from 10 different piece packs
Explore all floors of the mine
Visited all mainland locations
Catch a Boot
Meet the Fisher
Have 10 user-designed objects in your home
Make a stone bed
Plant 50 trees
Unlocked all design tool features
Design an original item and place it in your own house
Sleep in someone elses bed
Build your first house
Meet the Bug Catcher
Move in your first villager
Build a bridge to cross the river
Renovate a home for yourself
Complete Meeting Villagers