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