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.
Successfully asked a hostess out on a date.
Completed chapter 12.
Completed chapter 11.
Completed "The Fake Mizuki's Truth."
Completed "Man On a Ledge."
Obtained all Soul, Technique, and Body abilities.
Won against all rivals in MesuKing.
Completed chapter 10.
Completed 50% of the Completion List.
Assaulted by Majima from a manhole.
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 "Bet On A Champ."
Completed "A Doctor's Duty."
Won all Pocket Circuit races.
Completed 30 substories.
Completed chapter 6.
Slugger Majima forced his way into a fight.
Met Zombie Majima.
Completed "My Baby's a Showgirl."
Thug Majima forced his way into a fight.
Completed chapter 5.
Met the mysterious lady, Goromi.
Completed chapter 4.
Completed 10 substories.
Completed "The Price of an F-Cup."
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.
Breaker Majima forced his way into a fight.
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.
Played all minigames.
Walked 1km during Premium Adventure while holding Haruka's hand.
Completed the game in Legend Mode.
Assaulted by Majima from above.
Completed "Wife of a Yakuza."
Defeated Amon.
Completed all of the Climax Battles.
Obtained EX Rank on Haruka's Requests.