Here is the full list of all 36 Umihara Kawase Fresh! achievements.
Get all Trophies
Defeat Giga Tadpole's Little Sister
Defeat Crabpose Blue
Complete Quest "75. Welcome home"
Gain access to the deep area
Complete Quest "c07. The Last 'WILLOW'"
Defeat Blowfish
Gain access to the middle area2
Defeat Crabpose
Collect 5 travel memories
Go to the Shop
Clear 50 Time Attack stages
Complete 50 Quests
Clear stages over 100 times
Capture Pig (Cow)
Defeat Ganburian
Collection rate of at least 50% and check library
Complete Quest "33. Laplus' Letter"
Gain access to the middle area
Defeat Big Pig
Get bit by the black thing
Collect 100 materials
Can make 10 kinds of food
Unlock campers' tents
Can make 5 kinds of food
Clear 7 Challenge stages
30 deaths
Gain access to the sky area
10 deaths
Collection rate of at least 25% and check library
Clear 1 Challenge stage
Defeat Giga Tadpole
1 death
Unlock camp point
Clear 1 Time Attack stage
Complete Quest "01. Kawase's Map"