Here is the full list of all 56 Like a Dragon: Ishin! achievements. It takes around 120-150 hours to unlock all of the achievements on Windows.
Collected all achievements.
Completed every Ultimate Challenge.
Completed the final chapter.
Completed the game on Legend difficulty.
Made at least 10 ryo in sales at the Udon Shop.
Brought the Completion List to 100%.
Completed all tasks in the Diligence Records.
Completed all Bonds.
Cleared each of the courtesan minigames.
Played every minigame.
Paid off Haruka's debt in full.
Broke Ryoma's stats beyond their limits.
Completed all Substories.
Completed Chapter 12.
Completed Chapter 10.
Completed Chapter 8.
Enhanced equipment 100 times.
Completed Chapter 6.
Won 10 arena battles.
Defeated 100 enemies with Special Moves outside Ultimate Challenges.
Changed the interior design of your second home.
Performed every dance at Nichibuza.
Cleared the Sanada Stronghold.
Gathered 100 troopers for the Third Division.
Reached Level 50.
Cleared the Bandits' Mine.
Ordered at least one item at every restaurant.
Brought the Completion List to 50%.
Attained all Revelations.
Caught a total of 10 fish.
Tried your hand at each type of gambling.
Cleared the Bandits' Cave.
Earned at least 300,000 Virtue in total.
Reached max Social Rank in one of the locales.
Completed 40 Substories.
Entered a Battle Dungeon 3 times.
Performed every song at Utamaruya.
Completed Chapter 4.
Watched a Slice of Life event at your second home.
Completed 50 tasks in the Diligence Records.
Cooked 7 different dishes.
Placed bets on 5 chicken races.
Earned at least 100,000 Virtue in total.
Grew 10 different kinds of plants in the garden.
Completed 20 tasks in the Diligence Records.
Fulfilled 10 trade orders at your second home.
Earned at least 50,000 Virtue in total.
Helped the Tachibanagumi bring the Tengu to justice.
Trained with each master of combat.
Completed 10 Substories.
Completed your first Bond.
Earned at least 10,000 Virtue in total.
Completed 5 tasks in the Diligence Records.
Completed Chapter 2.
Unlocked 10 abilities with Soul Orbs.
Set foot in Tosa.