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