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