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