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