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