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