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.
Completed chapter 12.
Completed chapter 11.
Won all Pocket Circuit races.
Completed 50% of the Completion List.
Completed "Man On a Ledge."
The Mad Dog of Shimano forced his way into a fight.
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 "Bet On A Champ."
Completed "A Doctor's Duty."
Completed 30 substories.
Completed chapter 6.
Spent a steamy moment with Rina.
Completed "My Baby's a Showgirl."
Breaker Majima forced his way into a fight.
Slugger Majima forced his way into a fight.
Met Zombie Majima.
Completed chapter 5.
Successfully asked a hostess out on a date.
Completed 10 substories.
Completed chapter 4.
Met the mysterious lady, Goromi.
Obtained at least 10 Soul, Technique, and Body abilities.
Completed "The Price of an F-Cup."
Met Officer Majima.
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.
Thug Majima forced his way into a fight.
Upgraded all Majima Everywhere abilities.
Spent a steamy moment with Yui.
Completed all substories.
Completed all training for Komaki Style.
Obtained all Soul, Technique, and Body abilities.
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.
Assaulted by Majima from above.
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.