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