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