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