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