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