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