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