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