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