Here is the full list of all 24 Learn Japanese To Survive! Katakana War achievements.
Unlock the potential of corn soup.
Try 3 different types of seafood.
Complete lesson 3.
View a character's affection event.
Complete a side quest.
Complete lesson 2.
Complete lesson 1.
Complete lesson 4.
Complete lesson 5.
Complete lesson 6.
Complete lesson 7.
Complete lesson 8.
Complete lesson 9.
Complete lesson 10.
Clear the game.
Complete 5 side quests.
Complete 10 side quests.
Complete 15 side quests.
Complete all 20 side quests.
Maximize a character's affection level.
Maximize all character's affection levels.
Visit the Challenge Castle.
Obtain the ultimate sword.
Unlock the power of the Crystarium