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