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 "Wife of a Yakuza."
Completed chapter 12.
Completed chapter 11.
Completed "Bet On A Champ."
Completed "Man On a Ledge."
Completed "The Fake Mizuki's Truth."
The Mad Dog of Shimano forced his way into a fight.
Obtained all Soul, Technique, and Body abilities.
Completed chapter 10.
Completed chapter 8.
Completed chapter 9.
Completed all training for Komaki Style.
Reached Rank B in Majima Everywhere.
Completed chapter 7.
Completed "A Doctor's Duty."
Won against all rivals in MesuKing.
Completed chapter 6.
Completed 50% of the Completion List.
Won all Pocket Circuit races.
Completed "My Baby's a Showgirl."
Breaker Majima forced his way into a fight.
Completed chapter 5.
Met Zombie Majima.
Thug Majima forced his way into a fight.
Completed chapter 4.
Completed 30 substories.
Met the mysterious lady, Goromi.
Completed 10 substories.
Completed "The Price of an F-Cup."
Met Officer Majima.
Obtained at least 10 Soul, Technique, and Body abilities.
Completed chapter 2.
Completed chapter 3.
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.
Won all tournaments in the underground coliseum.
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 above.
Assaulted by Majima from a manhole.
Defeated Amon.
Completed all of the Climax Battles.
Obtained EX Rank on Haruka's Requests.