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