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