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