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