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