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