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