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