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