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