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