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