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