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