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