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 100% of the Completion List.
Completed all of the Climax Battles.
Played all minigames.
Completed all substories.
Defeated Amon.
Completed "Man On a Ledge."
Completed "Bet On A Champ."
Completed "Wife of a Yakuza."
Upgraded all Majima Everywhere abilities.
Spent a steamy moment with Rina.
Completed "The Fake Mizuki's Truth."
Enjoyed mahjong with a hostess.
The Mad Dog of Shimano forced his way into a fight.
Won all Pocket Circuit races.
Won against all rivals in MesuKing.
Obtained EX Rank on Haruka's Requests.
Completed the game in Legend Mode.
Slugger Majima forced his way into a fight.
Breaker Majima forced his way into a fight.
Assaulted by Majima from above.
Walked 1km during Premium Adventure while holding Haruka's hand.
Completed "A Doctor's Duty."
Obtained all Soul, Technique, and Body abilities.
Completed 50% of the Completion List.
Completed "My Baby's a Showgirl."
Spent a steamy moment with Yui.
Assaulted by Majima from a manhole.
Completed 30 substories.
Successfully asked a hostess out on a date.
Completed all training for Komaki Style.
Won all tournaments in the underground coliseum.
Reached Rank B in Majima Everywhere.
Completed "The Price of an F-Cup."
Completed 10 substories.
Met Zombie Majima.
Completed the final chapter.
Completed chapter 12.
Completed chapter 11.
Thug Majima forced his way into a fight.
Completed chapter 10.
Completed chapter 9.
Completed chapter 8.
Met the mysterious lady, Goromi.
Completed chapter 7.
Completed chapter 6.
Met Officer Majima.
Got chased by Majima.
Completed chapter 5.
Completed chapter 4.
Completed chapter 3.
Completed chapter 2.
Obtained at least 10 Soul, Technique, and Body abilities.
Completed chapter 1.
Collected the money owed.