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