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