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