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