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