Here is the full list of all 55 Yakuza Kiwami achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Completed the final chapter.
Completed 50% of the Completion List.
Completed chapter 12.
Completed chapter 11.
Assaulted by Majima from above.
Obtained all Soul, Technique, and Body abilities.
Breaker Majima forced his way into a fight.
Successfully asked a hostess out on a date.
Completed chapter 10.
Completed chapter 9.
Completed chapter 8.
The Mad Dog of Shimano forced his way into a fight.
Reached Rank B in Majima Everywhere.
Completed chapter 7.
Completed "A Doctor's Duty."
Completed chapter 6.
Completed 30 substories.
Completed "My Baby's a Showgirl."
Completed chapter 5.
Completed chapter 4.
Assaulted by Majima from a manhole.
Slugger Majima forced his way into a fight.
Met Zombie Majima.
Thug Majima forced his way into a fight.
Completed "The Price of an F-Cup."
Completed 10 substories.
Obtained at least 10 Soul, Technique, and Body abilities.
Met Officer Majima.
Completed chapter 3.
Completed chapter 2.
Got chased by Majima.
Completed chapter 1.
Collected the money owed.
Obtain all other achievements.
Completed 100% of the Completion List.
Upgraded all Majima Everywhere abilities.
Spent a steamy moment with Yui.
Spent a steamy moment with Rina.
Completed all substories.
Completed all training for Komaki Style.
Won all tournaments in the underground coliseum.
Enjoyed mahjong with a hostess.
Won all Pocket Circuit races.
Won against all rivals in MesuKing.
Played all minigames.
Walked 1km during Premium Adventure while holding Haruka's hand.
Completed the game in Legend Mode.
Met the mysterious lady, Goromi.
Completed "Bet On A Champ."
Completed "Wife of a Yakuza."
Completed "The Fake Mizuki's Truth."
Completed "Man On a Ledge."
Defeated Amon.
Completed all of the Climax Battles.
Obtained EX Rank on Haruka's Requests.